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Homonyms

IRMNG homonym list - genus level - Initial letter = "U" (169)

Please note, this is a provisional homonyms list from IRMNG on 2019-03-22, and is subject to change. It may include nomina nuda, rejected and otherwise non-current names, plus some published misspellings, in addition to homonyms that have been validly published. A small proportion of duplicate entries awaiting rationalisation may also be included.

Click on any genus name for additional details, as currently available.

Ubaghsia
     Ubaghsia Jullien, 1886 † · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Cheilostomatida (awaiting allocation) (Family)
     Ubaghsia Oppenheim, 1899 † accepted as Ubaghsia Oppenheim, 1899 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)

Uber
     Uber Cotton & Godfrey, 1931 † accepted as Uber Cotton & Godfrey, 1931 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Naticidae (Family)
 Uber Philippi, 1853 accepted as Polinices Montfort, 1810 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Naticidae (Family)

Uca
     Uca Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Ocypodidae (Family)
 Uca Latreille, 1819 accepted as Ucides Rathbun, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Ucididae (Family)

Uddmania
     Uddmania Frey, 1942 accepted as Uddmania Frey, 1942 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Uddmania Bergroth, 1915 accepted as Uddmania Bergroth, 1915 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Udora
     Udora Münster, 1839 † · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Procaridoidea (awaiting allocation) (Family)
 Udora Nuttall, 1818 accepted as Elodea A. Michaux, 1803 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Hydrocharitaceae (Family)

Udorius
 Udorius Lucas, 1920 accepted as Udorius Lucas, 1920 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Dryopidae (Family)
 Udorius Broun, 1882 accepted as Hydora Broun, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Elmidae (Family)

Ueckermannia
     Ueckermannia Kazmierski, 1996 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Tydeidae (Family)
     Ueckermannia Chant & McMurtry, 2005 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Phytoseiidae (Family)

Ugandella
     Ugandella Schmidt, 1932 accepted as Ugandella Schmidt, 1932 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Issidae (Family)
     Ugandella Sjöstedt, 1923 accepted as Ugandella Sjöstedt, 1923 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Orthoptera (awaiting allocation) (Family)

Uhleria
 Uhleria Comstock, 1883 accepted as Fiorinia Targioni-Tozzetti, 1869 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Diaspididae (Family)
 Uhleria Crawford, 1914 accepted as Lasiopsylla Froggatt, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Psyllidae (Family)

Uhleriella
     Uhleriella Ball, 1902 accepted as Uhleriella Ball, 1902 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Jassidae (Family)
     Uhleriella Matsumura, 1913 accepted as Uhleriella Matsumura, 1913 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Coreidae (Family)

Uhligia
     Uhligia Koenen, 1904 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ammonitida (Order) > Ammonoidea (awaiting allocation) (Family)
     Uhligia Horak, 1990 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Mordellidae (Family)

Uhligina
     Uhligina Schubert, 1899 accepted as Uhligina Schubert, 1899 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)
 Uhligina Yabe & Hanzawa, 1922 † accepted as Eorupertia Yabe & Hanzawa, 1925 † (Junior homonym of Uhligina Schubert, 1899) · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Rotaliida (Order) > Victoriellidae (Family)

Uighuroniscus
     Uighuroniscus Su, 1985 † accepted as Uighuroniscus Su, 1985 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Actinopterygii (awaiting allocation) (Order) > Actinopterygii (awaiting allocation) (Family)
     Uighuroniscus Su, 1980 † accepted as Uighuroniscus Su, 1980 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Actinopterygii (awaiting allocation) (Order) > Actinopterygii (awaiting allocation) (Family)

Uintasorex
     Uintasorex Matthew, 1909 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Microsyopidae (Family)
 Uintasorex Brown & Rose, 1976 † accepted as Uintasorex Matthew, 1909 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Microsyopidae (Family)

Ulaikoilia
     Ulaikoilia Bílý & Kubán, 2009 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)
 Ulaikoilia Bílý & Kubáň in Bílý, Kubáň & Volkovitsh, 2009 accepted as Melobasina Kerremans, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Buprestidae (Family)

Ulania
     Ulania Qi Tao, 1990 † accepted as Ulania Qi Tao, 1990 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Perissodactyla (Order) > Hyracodontidae (Family)
     Ulania Lin & Zhang, 1979 † accepted as Ulania Lin & Zhang, 1979 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
 Ulania Kirby, 1892 accepted as Ulamia Möschler, 1883 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Limacodidae (Family)

Ulea
 Ulea Müller Hal., 1897 accepted as Uleastrum W.R. Buck, 1985 · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Orthotrichales (Order) > Orthotrichaceae (Family)
 Ulea J. Schröter, 1892 accepted as Uleiella J. Schröter, 1894 · Fungi (Kingdom) > Basidiomycota (Phylum) > Ustilaginomycetes (Class) > Ustilaginales (Order) > Uleiellaceae (Family)

Ulema
     Ulema Megerle, 1832 accepted as Ulema Megerle, 1832 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)
 Ulema Bedel, 1889 accepted as Oulema Des Gozis, 1886 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Uleopsis
     Uleopsis Thériot, 1936 accepted as Uleopsis Thériot, 1936 (unassessed) · Plantae (Kingdom) > Bryophyta (Phylum) > Bryopsida (Class) > Dicranales (Order) > Dicranaceae (Family)
     Uleopsis F. Fedde in F. Fedde & K. Schuster, 1911 accepted as Uleopsis F. Fedde in F. Fedde & K. Schuster, 1911 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Commelinales (Order) > Commelinaceae (Family)

Ullia
 Ullia Roewer, 1943 accepted as Carlotta Roewer, 1943 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Opiliones (Order) > Gonyleptidae (Family)
     Ullia Henningsmoen, 1949 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda incertae sedis (Family)

Ulmiphyllum
 Ulmiphyllum G. Andreánszky, 1959 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Rosales (awaiting allocation) (Family)
     Ulmiphyllum Fontaine, 1889 † accepted as Ulmiphyllum Fontaine, 1889 † (unassessed) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)

Ulmites
 Ulmites J.W. Dawson, 1891 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Magnoliopsida (awaiting allocation) (Order) > Magnoliopsida (awaiting allocation) (Family)
     Ulmites Endlicher, 1848 † accepted as Ulmites Endlicher, 1848 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Ulmaceae (Family)

Ulmoxylon
 Ulmoxylon E. Hofmann, 1939 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Ulmaceae (Family)
     Ulmoxylon P. Kaiser, 1879 † accepted as Ulmoxylon P. Kaiser, 1879 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Ulmaceae (Family)

Ulmus
     Ulmus Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Ulmaceae (Family)
     Ulmus Distant, 1905 accepted as Ulmus Distant, 1905 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Tingidae (Family)

Ulna
     Ulna Capuse, 1973 accepted as Ulna Capuse, 1973 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Ulna accepted as Ulua Jordan & Snyder, 1908 (misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Carangidae (Family)

Ulocerus
     Ulocerus Schönherr, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
 Ulocerus Dalman, 1824 accepted as Ulocerus Schönherr, 1823 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Ulochaetes
     Ulochaetes Thomson, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Ulochaetes LeConte, 1854 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Uloma
     Uloma Latreille in Cuvier, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Uloma Stephens, 1829 accepted as Gnatocerus Thunberg, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Uloma Fauvel, 1904 accepted as Gnatocerus Thunberg, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Uloma Stephens, 1832 accepted as Gnatocerus Thunberg, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Uloma Dejean, 1821 accepted as Uloma Latreille in Cuvier, 1829 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
 Uloma Rafinesque, 1837 accepted as Colea Bojer ex C.F. Meisner, 1840 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Bignoniaceae (Family)

Ulomoides
     Ulomoides Blackburn, 1888 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)
     Ulomoides De la Escalera, 1927 accepted as Ulomoides De la Escalera, 1927 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Uloporus
 Uloporus Quélet, 1886 accepted as Gyrodon Opatowski, 1836 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Paxillaceae (Family)
 Uloporus Casey, 1889 accepted as Enneboeus Waterhouse, 1878 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Archeocrypticidae (Family)

Uloptera
     Uloptera Fenzl, 1843 accepted as Uloptera Fenzl, 1843 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)
 Uloptera Burmeister, 1842 accepted as Uloptera Burmeister, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Ulosomus
 Ulosomus Schönherr, 1825 accepted as Acalles Schönherr, 1825 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)
 Ulosomus Schoenherr, 1826 accepted as Neoulosomus O'Brien & Wibmer, 1982 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Curculionidae (Family)

Ulospermum
 Ulospermum A. Pomel, 1849 † accepted as · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)
     Ulospermum Link, 1821 accepted as Ulospermum Link, 1821 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Apiales (Order) > Apiaceae (Family)

Ulostoma
     Ulostoma Albers, 1850 accepted as Ulostoma Albers, 1850 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
 Ulostoma D. Don ex G. Don, 1837 accepted as Gentiana Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Gentianaceae (Family)

Ulotrichella
     Ulotrichella Iyengar, 1975 · Plantae (Kingdom) > Chlorophyta (Phylum) > Chlorophyceae (Class) > Chlamydomonadales (Order) > Chlorococcaceae (Family)
 Ulotrichella Y. Berger-Perrot, 1981 accepted as Chlorothrix Y. Berger-Perrot in Y. Berger-Perrot & J.C. Thomas, 1982 · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Ulotrichales (Order) > Ulotrichaceae (Family)

Ulrichia
     Ulrichia Jones, 1890 † · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Palaeocopida (Order) > Bolliidae (Family)
     Ulrichia Kinzelbach, 1971 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Strepsiptera (Order) > Stylopidae (Family)

Ulricholithus
     Ulricholithus Bancroft & Lamont, 1949 † accepted as Ulricholithus Bancroft & Lamont, 1949 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)
     Ulricholithus Bancroft, 1933 † accepted as Ulricholithus Bancroft, 1933 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Trilobita (awaiting allocation) (Order) > Trilobita (awaiting allocation) (Family)

Ulugbekia
     Ulugbekia Zakirov, 1961 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)
     Ulugbekia Savchenko, 1970 accepted as Ulugbekia Savchenko, 1970 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Limoniidae (Family)

Uluguria
     Uluguria Vezda, 2004 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Ostropales (Order) > Gomphillaceae (Family)
     Uluguria Otte, 1987 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Gryllidae (Family)
     Uluguria Richards, 1965 accepted as Uluguria Richards, 1965 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Uluguria Hoffman, 1964 accepted as Uluguria Hoffman, 1964 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Polydesmida (Order) > Gomphodesmidae (Family)

Ulula
     Ulula Cuvier, 1817 accepted as Ulula Cuvier, 1817 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Ulula Rambur, 1842 accepted as Ululodes Currie, 1899 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Neuroptera (Order) > Ascalaphidae (Family)

Ulva
     Ulva Linnaeus, 1753 · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Ulvales (Order) > Ulvaceae (Family)
     Ulva Lindsey, 1925 accepted as Ulva Lindsey, 1925 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Hesperiidae (Family)
 Ulva Adanson, 1763 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)

Ulvaria
     Ulvaria Ruprecht, 1850 · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Ulvales (Order) > Ulvaceae (Family)
     Ulvaria Jordan & Evermann, 1896 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Stichaeidae (Family)

Ulvella
     Ulvella P.L. Crouan & H.M. Crouan, 1859 · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Ulvales (Order) > Ulvellaceae (Family)
     Ulvella (Nylander) V. Trevisan, 1880 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)

Umbella
     Umbella d'Orbigny in Sagra, 1841 accepted as Umbella d'Orbigny in Sagra, 1841 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Umbella V.P. Maslov in E.V. Bykova, 1955 † · Plantae (Kingdom) > Charophyta (Phylum) > Charophyceae (Class) > Umbellinales (Order) > Umbellaceae (Family)
     Umbella Scudder, 1882 accepted as Umbella Scudder, 1882 · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Umbellula
 Umbellula K.B. Korde, 1973 † accepted as · Plantae (Kingdom) > Rhodophyta (Phylum) > Rhodophyta incertae sedis (Class) > Rhodophyceae (awaiting allocation) (Order) > Sajaniaceae (Family)
     Umbellula Cuvier, 1800 accepted as Umbellula Cuvier, 1800 · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Umbellula Gray, 1870 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Pennatulacea (Order) > Umbellulidae (Family)
     Umbellula Cuvier, 1798 · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Pennatulacea (Order) > Umbellulidae (Family)
 Umbellula E.F. Morris, 1955 accepted as Pseudobotrytis Krzemieniewska & Badura, 1954 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Coniochaetales (Order) > Coniochaetales incertae sedis (Family)

Umbellularia
     Umbellularia (C.G.D. Nees) Nuttall, 1842 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Laurales (Order) > Lauraceae (Family)
     Umbellularia Lamarck, 1801 accepted as Umbellularia Lamarck, 1801 (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)

Umbilicaria
     Umbilicaria G.F. Hoffmann, 1789 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Umbilicariales (Order) > Umbilicariaceae (Family)
     Umbilicaria Heister ex Fabricius, 1759 accepted as Umbilicaria Heister ex Fabricius, 1759 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Boraginales (Order) > Boraginaceae (Family)

Umbilicus
     Umbilicus A.P. de Candolle, 1801 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Saxifragales (Order) > Crassulaceae (Family)
     Umbilicus Duan & Cao, 1989 † accepted as Umbilicus Duan & Cao, 1989 † (unassessed) · Animalia (Kingdom) > Problematica (Phylum) > Problematica (awaiting allocation) (Class) > Problematica (awaiting allocation) (Order) > Problematica (awaiting allocation) (Family)

Umbla
 Umbla Catesby, 1771 accepted as Umbla Catesby, 1771 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Sphyraenidae (Family)
 Umbla Bonaparte, 1846 accepted as Umbla Bonaparte, 1846 (Misspelling) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Esociformes (Order) > Umbridae (Family)
 Umbla Rapp, 1854 accepted as Salvelinus Richardson, 1836 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Salmoniformes (Order) > Salmonidae (Family)

Umbonella
 Umbonella A. Adams, 1863 accepted as Isanda H. Adams & A. Adams, 1854 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Trochidae (Family)
 Umbonella Hincks, 1880 accepted as Umbonula Hincks, 1880 · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Umbonulidae (Family)

Umbotrochus
     Umbotrochus Perner, 1903 † · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Archaeogastropoda (Order) > Archaeogastropoda (awaiting allocation) (Family)
 Umbotrochus Thiele, 1924 accepted as Callumbonella Thiele, 1924 (homonym of Umbotrochus Perner, 1904) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Trochidae (Family)

Umbra
 Umbra Gronovius, 1763 accepted as Umbra Gronovius, 1763 (Published in a rejected work (ICZN)) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Esociformes (Order) > Umbridae (Family)
     Umbra Scopoli, 1777 accepted as Umbra Scopoli, 1777 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Esociformes (Order) > Umbridae (Family)
     Umbra Kramer in Scopoli, 1777 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Esociformes (Order) > Umbridae (Family)
     Umbra Cetti, 1777 accepted as Umbrina Cuvier, 1816 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Sciaenidae (Family)

Umbraculum
     Umbraculum Schumacher, 1817 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Umbraculida (Order) > Umbraculidae (Family)
     Umbraculum Gottsche, 1861 accepted as Umbraculum Gottsche, 1861 (unassessed) · Plantae (Kingdom) > Marchantiophyta (Phylum) > Jungermanniopsida (Class) > Metzgeriales (Order) > Hymenophytonaceae (Family)
 Umbraculum O. Kuntze, 1891 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Primulaceae (Family)

Umbraticus
 Umbraticus Özdikmen, 2009 accepted as Tomogonopus Sierwald & Mauriès, 2017 (junior homonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Spirostreptida (Order) > Spirostreptidae (Family)
     Umbraticus Voet, 1806 accepted as Umbraticus Voet, 1806 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Tenebrionidae (Family)

Unaus
     Unaus Gray, 1821 accepted as Unaus Gray, 1821 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
     Unaus Rafinesque, 1815 accepted as Unaus Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Unaüs
 Unaüs Gray, 1821 accepted as Unaus Gray, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
     Unaüs Rafinesque, 1815 accepted as Unaus Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)

Uncaria
     Uncaria Schreber, 1789 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
 Uncaria Burchell, 1822 accepted as Harpagophytum A.P. de Candolle ex Meisner, 1840 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Pedaliaceae (Family)

Uncina
     Uncina Kaplun in Kaplun & Krupchenko, 1991 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Rhynchonellida (Order) > Uncinulidae (Family)
     Uncina Quenstedt, 1850 † · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Uncinidae (Family)

Uncinaria
     Uncinaria Frölich, 1789 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Rhabditida (Order) > Ancylostomatidae (Family)
 Uncinaria H.G.L. Reichenbach, 1841 accepted as Uncaria Schreber, 1789 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
 Uncinaria Vest, 1867 accepted as Vestia Hesse, 1916 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Clausiliidae (Family)

Uncinia
     Uncinia Quatrefages, 1865 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Spionida (Order) > Spionidae (Family)
     Uncinia Persoon, 1807 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Cyperaceae (Family)
 Uncinia Velenovský, 1934 accepted as Hamatocanthoscypha M. Svrcek, 1977 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Helotiales (Order) > Hyaloscyphaceae (Family)

Uncinulella
     Uncinulella Del Guercio, 1919 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Cecidomyiidae (Family)
 Uncinulella Hara, 1936 accepted as Erysiphe R. Hedwig ex A.P. de Candolle, 1805 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Erysiphales (Order) > Erysiphaceae (Family)

Uncinulina
     Uncinulina Terquem, 1862 · Animalia (Kingdom) > Echinodermata (Phylum) > Holothuroidea (Class) > Aspidochirotida (Order) > Aspidochirotida (awaiting allocation) (Family)
     Uncinulina Bayle, 1878 † accepted as Uncinulina Bayle, 1878 † (unassessed) · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Rhynchonellida (Order) > Trigonirhynchiidae (Family)

Unda
     Unda Ponomarenko in Arnol'di, Zherikhin, Nikritin & Ponomarenko, 1977 † · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Trachypachidae (Family)
     Unda Schaeffer, 1926 · Protozoa (Kingdom) > Amoebozoa (Phylum) > Discosea (Class) > Vannellida (Order) > Vannellida incertae sedis (Family)

Undaria
     Undaria Suringar, 1873 · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Laminariales (Order) > Alariaceae (Family)
     Undaria Muir-Wood & Cooper, 1960 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Productida (Order) > Monticuliferidae (Family)
 Undaria Oken, 1815 accepted as Agaricia Lamarck, 1801 (invalid) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Scleractinia (Order) > Agariciidae (Family)

Undariella
     Undariella Y.E. Petrov & O.G. Kusakin ['Kussakin'], 1997 · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Laminariales (Order) > Alariaceae (Family)
 Undariella Y.P. Lee, 1998 accepted as Undariopsis K. Miyabe & K. Okamura in K. Okamura, 1902 (synonym) · Chromista (Kingdom) > Ochrophyta (Phylum) > Phaeophyceae (Class) > Laminariales (Order) > Alariaceae (Family)

Undella
     Undella Daday, 1887 · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Oligotrichida (Order) > Undellidae (Family)
     Undella Jörgensen, 1925 accepted as Undella Jörgensen, 1925 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)

Underwoodia
     Underwoodia C.H. Peck, 1890 · Fungi (Kingdom) > Ascomycota (Phylum) > Pezizomycetes (Class) > Pezizales (Order) > Pezizales incertae sedis (Family)
     Underwoodia Cook & Collins, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Chordeumatida (Order) > Caseyidae (Family)

Undina
     Undina Gould, 1837 accepted as Undina Gould, 1837 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Undina Gistl, 1848 · Animalia (Kingdom) > Echinodermata (Phylum) > Asteroidea (Class) > Valvatida (Order) > Ophidiasteridae (Family)
 Undina Dana, 1849 accepted as Undinula A. Scott, 1909 (synonym) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Calanidae (Family)
     Undina E.M. Fries, 1825 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Nostocales (Order) > Nostocaceae (Family)
     Undina Münster, 1834 † · Animalia (Kingdom) > Chordata (Phylum) > Sarcopterygii (Class) > Coelacanthiformes (Order) > Latimeriidae (Family)

Ungeria
     Ungeria H.W. Schott & Endlicher, 1832 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malvales (Order) > Malvaceae (Family)
 Ungeria Salfeld, 1908 † accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Polypodiopsida (Class) > Polypodiidae (awaiting allocation) (Order) > Polypodiidae (awaiting allocation) (Family)

Ungula
     Ungula Termier & Termier, 1977 † accepted as Ungula Termier & Termier, 1977 † (unassessed) · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)
 Ungula Pander, 1830 † accepted as Obolus Eichwald, 1829 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Lingulata (Class) > Lingulida (Order) > Obolidae (Family)
 Ungula B.A. Barlow, 1964 accepted as Amyema Van Tieghem, 1894 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Santalales (Order) > Loranthaceae (Family)

Ungulaspis
     Ungulaspis MacGillivray, 1921 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Diaspididae (Family)
 Ungulaspis Afanassieva & Karatajūtė-Talimaa, 1998 † accepted as Paraungulaspis Afanassieva & Karatajūtė-Talimaa, 2013 † (junior homonym) · Animalia (Kingdom) > Chordata (Phylum) > Cephalaspidomorphi (Class) > Cephalaspidiformes (Order) > Cephalaspidiformes (awaiting allocation) (Family)

Ungulina
     Ungulina Bosc, 1801 · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Venerida (Order) > Ungulinidae (Family)
 Ungulina Patouillard, 1900 accepted as Fomes (E.M. Fries) E.M. Fries, 1849 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Polyporaceae (Family)

Ungulites
     Ungulites Zhuravleva, 1972 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Discosorida (Order) > Discosorida (awaiting allocation) (Family)
 Ungulites Bronn, 1848 † accepted as Obolus Eichwald, 1829 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Lingulata (Class) > Lingulida (Order) > Obolidae (Family)
     Ungulites Stauffer, 1933 † · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Polychaeta (awaiting allocation) (Order) > Polychaeta incertae sedis (Family)

Unica
     Unica Šnoflák, 1951 accepted as Unica Šnoflák, 1951 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Hymenoptera (awaiting allocation) (Family)
     Unica Gorbach, 1985 † · Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pterioida (Order) > Pterioida (awaiting allocation) (Family)

Unicinaria
 Unicinaria Linstow, 1902 accepted as Uncinaria Frölich, 1789 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Rhabditida (Order) > Ancylostomatidae (Family)
 Unicinaria Westerlund, 1884 accepted as Vestia Hesse, 1916 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Stylommatophora (Order) > Clausiliidae (Family)

Unicola
     Unicola Rafinesque, 1815 accepted as Unicola Rafinesque, 1815 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Trematoda (Class) > Trematoda (awaiting allocation) (Order) > Trematoda (awaiting allocation) (Family)
 Unicola accepted as Unciola Say, 1818 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Amphipoda (Order) > Unciolidae (Family)
 Unicola Haldeman, 1842 accepted as Unionicola Haldeman, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Actinedida (Order) > Unionicolidae (Family)

Unicornu
     Unicornu Grateloup, 1835 accepted as Unicornu Grateloup, 1835 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
     Unicornu Fabricius, 1823 accepted as Unicornu Fabricius, 1823 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Unicornus
 Unicornus Montfort, 1810 accepted as Acanthina Fischer von Waldheim, 1807 (synonym) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Muricidae (Family)
 Unicornus Rafinesque, 1815 accepted as Rhinoceros Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Perissodactyla (Order) > Rhinocerotidae (Family)

Unidens
     Unidens Hayward & Kawagata, 2012 † accepted as Unidens Hayward & Kawagata, 2012 † (junior homonym of Unidens Schinz, 1822) · Chromista (Kingdom) > Retaria (Phylum) > Globothalamea (Class) > Rotaliida (Order) > Stilostomellidae (Family)
 Unidens Schinz in Cuvier, 1822 accepted as Monodonta Lamarck, 1799 (unnecessary substitute name for "Monodon Lam." [= Monodonta Lamarck, 1799]) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Vetigastropoda (Order) > Trochidae (Family)

Unifolium
 Unifolium Zinn, 1757 accepted as Unifolium Zinn, 1757 (Not validly published) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)
 Unifolium Ludwig, 1757 accepted as Maianthemum F.H. Wiggers, 1780 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Asparagaceae (Family)

Uniplicaria
     Uniplicaria Pfeiffer, 1856 accepted as Uniplicaria Pfeiffer, 1856 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)
     Uniplicaria Martens, 1895 accepted as Uniplicaria Martens, 1895 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Unkana
     Unkana Matsumura, 1935 accepted as Unkana Matsumura, 1935 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Unkana Distant, 1886 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Hesperiidae (Family)

Unxia
     Unxia Thomson, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Unxia Linnaeus f., 1782 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Uphantenia
     Uphantenia Vanuxem, 1842 † accepted as Uphantenia Vanuxem, 1842 † (unassessed) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)
 Uphantenia Dawson & Hinde, 1889 † accepted as Uphantenia Dawson & Hinde, 1889 † (Misspelling) · Animalia (Kingdom) > Porifera (Phylum) > Porifera (awaiting allocation) (Class) > Porifera (awaiting allocation) (Order) > Porifera (awaiting allocation) (Family)

Upogebia
     Upogebia Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Upogebiidae (Family)
 Upogebia Borradaile, 1903 accepted as Upogebia Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Upogebiidae (Family)

Uptiotes
     Uptiotes Walckenaer, 1833 accepted as Uptiotes Walckenaer, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Uloboridae (Family)
     Uptiotes Walckenaer, 1838 accepted as Uptiotes Walckenaer, 1838 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Uloboridae (Family)

Uracanthus
     Uracanthus Fitzinger, 1865 accepted as Uracanthus Fitzinger, 1865 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Uracanthus Hope, 1835 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Uracanthus Diesing, 1861 accepted as Uracanthus Diesing, 1861 (unassessed) · Animalia (Kingdom) > Nematoda (Phylum) > Nematoda (awaiting allocation) (Class) > Nematoda (awaiting allocation) (Order) > Nematoda (awaiting allocation) (Family)

Uraeus
     Uraeus Agassiz, 1832 † accepted as Uraeus Agassiz, 1832 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Amiiformes (Order) > Caturidae (Family)
     Uraeus Wagler, 1830 accepted as Uraeus Wagler, 1830 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Uragus
     Uragus Keyserling & Blasius, 1840 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Passeriformes (Order) > Fringillidae (Family)
     Uragus Rafinesque, 1815 accepted as Uragus Rafinesque, 1815 · Animalia (Kingdom) > Cnidaria (Phylum) > Cnidaria (awaiting allocation) (Class) > Cnidaria (awaiting allocation) (Order) > Cnidaria (awaiting allocation) (Family)
     Uragus Guérin-Ménéville, 1844 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Uralella
     Uralella K.B. Korde, 1957 † · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Dasycladales (Order) > Dasycladaceae (Family)
     Uralella Makridin, 1960 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Rhynchonellata (Class) > Terebratulida (Order) > Terebratulidae (Family)

Uralia
     Uralia Mulsant & Verreaux, 1866 accepted as Uralia Mulsant & Verreaux, 1866 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
     Uralia Lipina, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)
     Uralia Kukalova-Peck & Sinichenkova, 1992 † accepted as Uralia Kukalova-Peck & Sinichenkova, 1992 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Insecta (awaiting allocation) (Order) > Insecta (awaiting allocation) (Family)
     Uralia Martynova, 1976 † accepted as Uralia Martynova, 1976 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Collembola (Class) > (Order) > Collembola (awaiting allocation) (Family)
 Uralia Licharew, 1925 † accepted as Eolyttonia Fredericks, 1924 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Productida (Order) > Lyttoniidae (Family)
     Uralia E.F. Tschirkova-Zalesskaja, 1957 † accepted as Uralia E.F. Tschirkova-Zalesskaja, 1957 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Trimerophytopsida (Class) > Trimerophytales (Order) > Trimerophytales (awaiting allocation) (Family)

Uralina
 Uralina Schuchert & Le Vene, 1929 † accepted as Eolyttonia Fredericks, 1924 † · Animalia (Kingdom) > Brachiopoda (Phylum) > Strophomenata (Class) > Productida (Order) > Lyttoniidae (Family)
 Uralina Rozhdestvenskaya, 1962 † accepted as Uralinova Kempf, 2015 † (According to Kempf (2015) this is an invalid junior homonym of Uralina Schuchert & LeVene, 1929 (Brachiopoda)) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Gotlandellidae (Family)

Uralites
     Uralites B.I. Tchuvashov, 1973 † accepted as Uralites B.I. Tchuvashov, 1973 † (unassessed) · Plantae (Kingdom) > Rhodophyta (Phylum) > Rhodophyta incertae sedis (Class) > Rhodophyceae (awaiting allocation) (Order) > Ungdarellaceae (Family)
     Uralites Tchernov, 1907 accepted as Uralites Tchernov, 1907 (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Uralophyllum
     Uralophyllum A.N. Kristofovic, 1933 † accepted as Uralophyllum A.N. Kristofovic, 1933 † (unassessed) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae (awaiting allocation) (Family)
     Uralophyllum Sochkina, 1936 † accepted as Uralophyllum Sochkina, 1936 † (unassessed) · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Rugosa (Order) > Digonophyllidae (Family)

Uralopora
     Uralopora Sokolov, 1951 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Tabulata (Order) > Tabulata (awaiting allocation) (Family)
     Uralopora Sokolov, 1950 † accepted as Uralopora Sokolov, 1951 † · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Tabulata (Order) > Tabulata (awaiting allocation) (Family)

Urana
     Urana Coelho & Nessimian, 1992 accepted as Urana Coelho & Nessimian, 1992 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cicadellidae (Family)
     Urana Melichar, 1901 accepted as Urana Melichar, 1901 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)

Urania
     Urania Fabricius, 1807 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Uraniidae (Family)
 Urania A.P. de Candolle, 1855 accepted as Urania A.P. de Candolle, 1855 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Urania Schreber, 1789 accepted as Ravenala Adanson, 1763 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Zingiberales (Order) > Strelitziaceae (Family)

Uranocentron
     Uranocentron Gray, 1831 accepted as Uranocentron Gray, 1831 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Tropiduridae (Family)
     Uranocentron Gray, 1840 accepted as Uranocentron Gray, 1840 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Uranops
     Uranops Fitzinger, 1843 accepted as Uranops Fitzinger, 1843 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Uranops Hemming, 1929 accepted as Lysandra Hemming, 1933 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)

Uranoscopus
     Uranoscopus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Uranoscopidae (Family)
 Uranoscopus Gronow, 1763 accepted as Cottus Linnaeus, 1758 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Cottidae (Family)

Uranthera
 Uranthera Naudin, 1845 accepted as Acisanthera P. Browne, 1756 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)
 Uranthera Pax & K. Hoffmann in Engler, 1911 accepted as Phyllanthus Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)

Uraptera
     Uraptera Billberg, 1820 accepted as Uraptera Billberg, 1820 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Uraptera Müller & Henle, 1837 accepted as Rioraja Whitley, 1939 · Animalia (Kingdom) > Chordata (Phylum) > Chondrichthyes (Class) > Rajiformes (Order) > Rajidae (Family)

Urartucoris
     Urartucoris Puchkov, 1979 accepted as Urartucoris Puchkov, 1979 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Coreidae (Family)
     Urartucoris Kment, Fent & Japoshvili, 2013 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Coreidae (Family)

Urbanella
     Urbanella Schepotieff, 1912 accepted as Urbanella Schepotieff, 1912 (unassessed) · Protozoa (Kingdom) > (Phylum) > Protozoa (awaiting allocation) (Class) > (Order) > (Family)
 Urbanella Pierre, 1890 accepted as Pouteria Aublet, 1775 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Ericales (Order) > Sapotaceae (Family)
     Urbanella Malakhova, 1963 † · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Fusulinida (Order) > Endothyridae (Family)

Urbania
     Urbania Mikšič, 1963 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
     Urbania Hampson in Romanoff, 1901 accepted as Urbania Hampson in Romanoff, 1901 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Urbania Vatke, 1875 accepted as Urbania Vatke, 1875 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Scrophulariaceae (Family)
 Urbania R.A. Philippi, 1891 accepted as Junellia Moldenke, 1940 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Verbenaceae (Family)

Urceola
     Urceola Roxburgh, 1799 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)
 Urceola Vandelli, 1788 accepted as Urceola Vandelli, 1788 (nomen rejiciendum) · Plantae (Kingdom) > Plantae (awaiting allocation) (Phylum) > Plantae (awaiting allocation) (Class) > Plantae (awaiting allocation) (Order) > Plantae incertae sedis (Family)
     Urceola Quélet, 1886 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Helotiales (Order) > Helotiales incertae sedis (Family)

Urceolaria
 Urceolaria Molina, 1810 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Gesneriaceae (Family)
     Urceolaria Bonorden, 1851 · Fungi (Kingdom) > Ascomycota (Phylum) > Pezizomycetes (Class) > Pezizales (Order) > Pezizales incertae sedis (Family)
 Urceolaria Molina ex J.D. Brandis, 1786 accepted as Urceolaria Molina ex J.D. Brandis, 1786 (nomen rejiciendum) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Gesneriaceae (Family)
 Urceolaria Willdenow in Cothenius, 1790 accepted as Schradera Vahl, 1796 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
 Urceolaria A.W. Jannsen, 2005 accepted as Cuvierina Boas, 1886 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Thecosomata (Order) > Cavoliniidae (Family)
 Urceolaria Herbert, 1821 accepted as Urceolina H.G.L. Reichenbach, 1829 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Amaryllidaceae (Family)
 Urceolaria Acharius, 1803 accepted as Diploschistes Norman, 1853 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Ostropales (Order) > Thelotremataceae (Family)
 Urceolaria Hooker, 1821 accepted as Aspicilia A. Massalongo, 1852 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Pertusariales (Order) > Megasporaceae (Family)
     Urceolaria Stein, 1854 · Chromista (Kingdom) > Ciliophora (Phylum) > Oligohymenophorea (Class) > Peritrichida (Order) > Urceolariidae (Family)
 Urceolaria Lamarck, 1801 accepted as Rotaria Scopoli, 1777 · Animalia (Kingdom) > Rotifera (Phylum) > Bdelloidea (Class) > Bdelloida (Order) > Philodinidae (Family)

Urceolina
     Urceolina H.G.L. Reichenbach, 1829 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asparagales (Order) > Amaryllidaceae (Family)
 Urceolina Tuckerman, 1875 accepted as Orceolina Hertel, 1970 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Agyriales (Order) > Trapeliaceae (Family)

Urceolus
 Urceolus Velenovský, 1939 accepted as Resupinatus C.G.D. Nees ex S.F. Gray, 1821 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Tricholomataceae (Family)
     Urceolus C. von Mereschkowsky, 1879 · Protozoa (Kingdom) > Euglenozoa (Phylum) > Peranemea (Class) > Peranemida (Order) > Peranemidae (Family)

Urda
     Urda Münster, 1840 † · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Isopoda (Order) > Isopoda (awaiting allocation) (Family)
     Urda Reiche in Sturm, 1843 accepted as Urda Reiche in Sturm, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Coleoptera (awaiting allocation) (Family)

Uresipedilum
 Uresipedilum Oyewo & Sæther, 1998 accepted as Polypedilum Kieffer, 1913 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)
     Uresipedilum Sasa & Okazawa, 1991 accepted as Polypedilum Kieffer, 1913 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)
 Uresipedilum Sasa in Sasa & Kikuchi, 1995 accepted as Polypedilum Kieffer, 1913 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)

Uria
     Uria Kirby & Spence, 1828 accepted as Uria Kirby & Spence, 1828 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Uria Brisson, 1760 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Charadriiformes (Order) > Alcidae (Family)
 Uria Möhring, 1758 accepted as Uria Brisson, 1760 · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Ciconiiformes (Order) > Laridae (Family)

Urnula
     Urnula E.M. Fries, 1849 · Fungi (Kingdom) > Ascomycota (Phylum) > Pezizomycetes (Class) > Pezizales (Order) > Sarcosomataceae (Family)
     Urnula Claparède & Lachmann, 1857 · Chromista (Kingdom) > Ciliophora (Phylum) > Phyllopharyngea (Class) > Suctorida (Order) > Urnulidae (Family)
 Urnula Wiesner, 1931 accepted as Ammopemphix Loeblich, 1952 · Chromista (Kingdom) > Retaria (Phylum) > Monothalamea (Class) > Astrorhizida (Order) > Hemisphaeramminidae (Family)

Urnularia
 Urnularia Stapf, 1901 accepted as Willughbeia Roxburgh, 1820 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Apocynaceae (Family)
 Urnularia P.A. Karsten, 1866 accepted as Chaetosphaeria L.R. Tulasne & C. Tulasne, 1863 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Chaetosphaeriales (Order) > Chaetosphaeriaceae (Family)

Urocentrum
     Urocentrum Nitzsch in Ersch & Gruber, 1827 · Chromista (Kingdom) > Ciliophora (Phylum) > Oligohymenophorea (Class) > Hymenostomatida (Order) > Urocentridae (Family)
 Urocentrum Wiegmann, 1835 accepted as Uracentron Kaup, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Tropiduridae (Family)

Urocentrus
 Urocentrus von Düben, 1845 accepted as Beryx Cuvier, 1829 (synonym) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Beryciformes (Order) > Berycidae (Family)
 Urocentrus Kner, 1868 accepted as Pholis Scopoli, 1777 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Pholidae (Family)

Urocryptus
     Urocryptus Westwood, 1840 accepted as Urocryptus Westwood, 1840 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Eupelmidae (Family)
 Urocryptus Temminck, 1838 accepted as Saccopteryx Illiger, 1811 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Chiroptera (Order) > Emballonuridae (Family)

Uroctonoides
 Uroctonoides Chamberlin, 1920 accepted as Teuthraustes Simon, 1879 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Scorpiones (Order) > Chactidae (Family)
 Uroctonoides Hoffmann, 1931 accepted as Paruroctonus Werner in Bronn, 1934 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Scorpiones (Order) > Vaejovidae (Family)

Urocyclon
     Urocyclon Song & Wilbert, 2000 · Chromista (Kingdom) > Ciliophora (Phylum) > Oligohymenophorea (Class) > Scuticociliatida (Order) > Uronematidae (Family)
     Urocyclon Small & Lynn, 1985 accepted as Urocyclon Song & Wilbert, 2000 · Chromista (Kingdom) > Ciliophora (Phylum) > Oligohymenophorea (Class) > Scuticociliatida (Order) > Uronematidae (Family)

Urocystis
     Urocystis Villot, 1880 · Animalia (Kingdom) > Platyhelminthes (Phylum) > Cestoda (Class) > Cyclophyllidea (Order) > Hymenolepididae (Family)
     Urocystis Rabenhorst ex Fuckel, 1870 · Fungi (Kingdom) > Basidiomycota (Phylum) > Ustilaginomycetes (Class) > Urocystidiales (Order) > Urocystidaceae (Family)

Urodiscus
     Urodiscus Sclater, 1860 accepted as Urodiscus Sclater, 1860 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)
 Urodiscus Berlese, 1917 accepted as Nenteria Oudemans, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Nenteriidae (Family)

Urodon
     Urodon Turczaninow, 1849 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Urodon Schönherr, 1823 accepted as Bruchela Dejean, 1821 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)

Urolepis
     Urolepis Walker, 1846 accepted as Urolepis Walker, 1846 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hymenoptera (Order) > Pteromalidae (Family)
     Urolepis Bellotti in Stoppani, 1857 † accepted as Urolepis Bellotti in Stoppani, 1857 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
     Urolepis (A.P. de Candolle) R.M. King & H.E. Robinson, 1971 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)

Uroleptes
     Uroleptes Fitzinger, 1843 accepted as Uroleptes Fitzinger, 1843 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
 Uroleptes Wagler, 1830 accepted as Tamandua Gray, 1825 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Pilosa (Order) > Myrmecophagidae (Family)

Uroleptopsis
     Uroleptopsis Kahl, 1932 · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Urostylida (Order) > Pseudokeronopsidae (Family)
 Uroleptopsis Dragesco, 1970 accepted as Uroleptopsis Kahl, 1932 · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Hypotrichida (Order) > Holostichidae (Family)

Uromya
 Uromya Rondani, 1856 accepted as Uromya Rondani, 1856 (Misspelling) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Diptera (awaiting allocation) (Family)
     Uromya Rollier, 1913 † accepted as Uromya Rollier, 1913 † (unassessed) · Animalia (Kingdom) > Mollusca (Phylum) > Mollusca (awaiting allocation) (Class) > Mollusca (awaiting allocation) (Order) > Mollusca (awaiting allocation) (Family)

Uronectes
     Uronectes Bronn, 1850 † accepted as Uronectes Bronn, 1850 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Anaspidacea (Order) > Uronectidae (Family)
 Uronectes Günther, 1862 accepted as Liparis Scopoli, 1777 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Scorpaeniformes (Order) > Liparidae (Family)

Uronema
     Uronema Lagerheim, 1887 · Plantae (Kingdom) > Chlorophyta (Phylum) > Chlorophyceae (Class) > Chaetophorales (Order) > Chaetophoraceae (Family)
     Uronema Dujardin, 1841 · Chromista (Kingdom) > Ciliophora (Phylum) > Oligohymenophorea (Class) > Scuticociliatida (Order) > Uronematidae (Family)

Uronemus
     Uronemus Rafinesque, 1815 accepted as Uronemus Rafinesque, 1815 · Animalia (Kingdom) > Annelida (Phylum) > Polychaeta (Class) > Polychaeta (awaiting allocation) (Order) > Polychaeta (awaiting allocation) (Family)
     Uronemus Agassiz, 1844 † accepted as Uronemus Agassiz, 1844 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Sarcopterygii (Class) > Dipnoiformes (Order) > Uronemidae (Family)

Uronyx
     Uronyx Rafinesque, 1815 accepted as Uronyx Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)
     Uronyx Rafinesque, 1832 accepted as Uronyx Rafinesque, 1832 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Reptilia (awaiting allocation) (Order) > Reptilia (awaiting allocation) (Family)

Urophora
     Urophora Robineau-Desvoidy, 1830 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Tephritidae (Family)
     Urophora Gray, 1832 accepted as Urophora Gray, 1832 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aetalionidae (Family)
 Urophora Sommerfelt ex Arnold, 1899 accepted as Bacidia G. De Notaris, 1846 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Lecanorales (Order) > Ramalinaceae (Family)

Urophyllum
     Urophyllum Wallich in Roxburgh, 1824 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Rubiaceae (Family)
 Urophyllum K.H.E. Koch, 1857 accepted as Urospatha H.W. Schott, 1853 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Araceae (Family)

Uroplata
     Uroplata Guérin-Ménéville, 1844 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
     Uroplata Chevrolat, 1837 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)
 Uroplata Dejean, 1835 accepted as Uroplata Guérin-Ménéville, 1844 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Chrysomelidae (Family)

Uroptera
     Uroptera Rafinesque, 1815 accepted as Uroptera Rafinesque, 1815 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
     Uroptera Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Uropterus
 Uropterus Lacordaire, 1866 accepted as Uroptera Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)
 Uropterus Latreille, 1828 accepted as Uroptera Berthold in Latreille, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Brentidae (Family)

Uropteryx
     Uropteryx Agassiz, 1835 † accepted as Uropteryx Agassiz, 1835 † (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Pisces (awaiting allocation) (Class) > Pisces (awaiting allocation) (Order) > Pisces (awaiting allocation) (Family)
 Uropteryx Agassiz, 1846 accepted as Ourapteryx Leach, 1814 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Urosoma
     Urosoma Spencer, 1930 † · Animalia (Kingdom) > Echinodermata (Phylum) > Ophiuroidea (Class) > Oegophiurida (Order) > Euzonosomatidae (Family)
     Urosoma Kowalewski, 1882 · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Hypotrichida (Order) > Oxytrichidae (Family)

Urospatha
     Urospatha H.W. Schott, 1853 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Araceae (Family)
     Urospatha Salvadori, ? 1869 accepted as Urospatha Salvadori, ? 1869 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Aves (Class) > Aves (awaiting allocation) (Order) > Aves (awaiting allocation) (Family)

Urospina
 Urospina Sellnick, 1932 accepted as Trichouropoda Berlese, 1916 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Mesostigmata (Order) > Trematuridae (Family)
 Urospina von Gelei, 1944 accepted as Urospinula Corliss, 1960 · Chromista (Kingdom) > Ciliophora (Phylum) > Spirotrichea (Class) > Hypotrichida (Order) > Spirofilidae (Family)

Urospora
     Urospora J.E. Areschoug, 1866 · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Ulotrichales (Order) > Ulotrichaceae (Family)
     Urospora Schneider, 1875 · Chromista (Kingdom) > Miozoa (Phylum) > (Class) > Eugregarinida (Order) > Urosporidae (Family)
 Urospora Fayod, 1889 accepted as Panellus P.A. Karsten, 1879 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Mycenaceae (Family)
 Urospora Fabre, 1879 accepted as Urosporella G.F. Atkinson, 1897 · Fungi (Kingdom) > Ascomycota (Phylum) > Sordariomycetes (Class) > Xylariales (Order) > Xylariales incertae sedis (Family)

Urostylis
     Urostylis C.F. Meisner, 1839 accepted as Urostylis C.F. Meisner, 1839 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Asterales (Order) > Asteraceae (Family)
     Urostylis Westwood in Hope, 1837 accepted as Urostylis Westwood in Hope, 1837 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Urostylididae (Family)

Urotheca
     Urotheca Matthew, 1899 accepted as Urotheca Matthew, 1899 (unassessed) · Animalia (Kingdom) > Annelida (Phylum) > Annelida (awaiting allocation) (Class) > Annelida (awaiting allocation) (Order) > Annelida (awaiting allocation) (Family)
     Urotheca Cocteau & Bibron in Sagra, 1843 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
 Urotheca Gilg in Engler & Prantl, 1897 accepted as Gravesia Naudin, 1851 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Myrtales (Order) > Melastomataceae (Family)

Urothemis
     Urothemis Brauer, 1868 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Libellulidae (Family)
     Urothemis Hagen, 1875 accepted as Urothemis Hagen, 1875 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Odonata (Order) > Odonata (awaiting allocation) (Family)

Urotropis
     Urotropis Silvestri, 1896 accepted as Urotropis Silvestri, 1896 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Diplopoda (Class) > Spirostreptida (Order) > Spirostreptidae (Family)
     Urotropis Jiménez de la Espada, 1875 accepted as Urotropis Jiménez de la Espada, 1875 (unassessed) · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Caudata (Order) > Plethodontidae (Family)
 Urotropis Rafinesque, 1822 accepted as Cryptobranchus Leuckart, 1821 · Animalia (Kingdom) > Chordata (Phylum) > Amphibia (Class) > Caudata (Order) > Cryptobranchidae (Family)

Uroxys
     Uroxys Rafinesque, 1815 accepted as Uroxys Rafinesque, 1815 · Animalia (Kingdom) > Chordata (Phylum) > Chondrichthyes (Class) > Rajiformes (Order) > Rajidae (Family)
     Uroxys Westwood, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Ursia
     Ursia Barnes & McDunnough, 1911 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Notodontidae (Family)
 Ursia I.T. Vassilczenko, 1979 accepted as Trifolium Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Ursina
     Ursina Jordan, 1964 † accepted as Ursina Jordan, 1964 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Ostracoda (Class) > Ostracoda (awaiting allocation) (Order) > Ostracoda (awaiting allocation) (Family)
     Ursina Sinev, 1988 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)

Ursinella
 Ursinella O. Kuntze, 1891 accepted as · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)
     Ursinella Eddy & McCollum, 1998 † · Animalia (Kingdom) > Arthropoda (Phylum) > Trilobita (Class) > Corynexochida (Order) > Corynexochida (awaiting allocation) (Family)

Urtica
     Urtica Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Rosales (Order) > Urticaceae (Family)
 Urtica Borlase, 1758 accepted as · Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Actiniaria (Order) > Actiniaria incertae sedis (Family)

Urus
 Urus C.H. Smith, 1827 accepted as Bos Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Bovidae (Family)
 Urus Bojanus, 1827 accepted as Bison Smith, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Bovidae (Family)
 Urus Swainson, 1835 † accepted as Bison Smith, 1827 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Artiodactyla (Order) > Bovidae (Family)

Urvillea
     Urvillea Kunth in Humboldt, Bonpland & Kunth, 1821 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Sapindales (Order) > Sapindaceae (Family)
     Urvillea Kirkaldy, 1907 accepted as Urvillea Kirkaldy, 1907 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cixiidae (Family)

Usingeria
     Usingeria Schouteden, 1952 accepted as Usingeria Schouteden, 1952 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Aradidae (Family)
 Usingeria Coetzee & Segerman, 1992 accepted as Rusingeria Coetzee & Kment, 2013 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Cimicidae (Family)

Usofila
     Usofila Marx, 1891 accepted as Usofila Marx, 1891 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Arachnida (awaiting allocation) (Order) > Arachnida (awaiting allocation) (Family)
     Usofila Keyserling, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Telemidae (Family)

Ussuria
     Ussuria Diener, 1895 † · Animalia (Kingdom) > Mollusca (Phylum) > Cephalopoda (Class) > Ceratitida (Order) > Ussuriidae (Family)
 Ussuria N.N. Tzvelev, 2001 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Caryophyllaceae (Family)
     Ussuria S.I. Nevolina, 1984 † accepted as Ussuria S.I. Nevolina, 1984 † (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Pinopsida (Class) > Pinopsida (awaiting allocation) (Order) > Pinopsida (awaiting allocation) (Family)
 Ussuria Nikolskii, 1903 accepted as Misgurnus Lacepède, 1803 · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Cypriniformes (Order) > Cobitidae (Family)
 Ussuria Danilevsky, 1995 accepted as Ussurella Danilevsky, 1997 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Ussuriella
     Ussuriella Paramonow, 1929 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Rhagionidae (Family)
 Ussuriella Sosnina, 1956 † accepted as Kahlerina Kochansky-Devidé & Ramovs, 1955 † (Opinion of Loeblich & Tappan, 1987) · Chromista (Kingdom) > Retaria (Phylum) > Tubothalamea (Class) > Fusulinida (Order) > Verbeekinidae (Family)

Usteria
     Usteria Willdenow in Cothenius, 1790 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Loganiaceae (Family)
 Usteria Medikus, 1790 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Liliales (Order) > Liliaceae (Family)
 Usteria Cavanilles, 1793 accepted as · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Lamiales (Order) > Scrophulariaceae (Family)
 Usteria Batista & H. Maia, 1962 accepted as Mycousteria M.L. Farr, 1986 · Fungi (Kingdom) > Ascomycota (Phylum) > Ascomycota incertae sedis (Class) > Ascomycota incertae sedis (Order) > Ascomycota incertae sedis (Family)
 Usteria A.W. Dennstedt, 1818 accepted as Acalypha Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Euphorbiaceae (Family)

Utahia
     Utahia Gazin, 1958 † · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Primates (Order) > Anaptomorphidae (Family)
 Utahia N.L. Britton & Rose, 1922 accepted as Pediocactus N.L. Britton & J.N. Rose in N.L. Britton & A. Brown, 1913 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Caryophyllales (Order) > Cactaceae (Family)

Utania
     Utania G. Don, 1837 accepted as Utania G. Don, 1837 (unassessed) · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Gentianales (Order) > Loganiaceae (Family)
     Utania Sukacheva, 1982 † accepted as Utania Sukacheva, 1982 † (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Trichoptera (Order) > Trichoptera (awaiting allocation) (Family)

Ute
 Ute Dendy & Row, 1913 accepted as Ute Dendy & Row, 1913 · Animalia (Kingdom) > Porifera (Phylum) > Calcarea (Class) > Sycettida (Order) > Grantiidae (Family)
     Ute Schmidt, 1862 · Animalia (Kingdom) > Porifera (Phylum) > Calcarea (Class) > Sycettida (Order) > Grantiidae (Family)
 Ute Chun, 1889 accepted as Tinerfe Chun, 1898 · Animalia (Kingdom) > Ctenophora (Phylum) > Tentaculata (Class) > Cydippida (Order) > Haeckeliidae (Family)

Uterosomus
     Uterosomus Schönherr, 1839 accepted as Uterosomus Schönherr, 1839 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)
     Uterosomus Dejean, 1834 accepted as Uterosomus Dejean, 1834 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Anthribidae (Family)

Utica
     Utica White, 1847 accepted as Utica White, 1847 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Grapsidae (Family)
 Utica Hewitson, 1865 accepted as Theclinesthes Röber, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lycaenidae (Family)
     Utica White, 1847 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Varunidae (Family)

Utinga
     Utinga Wilcox & Pimentel, 1989 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Mydidae (Family)
     Utinga Marcus, 1949 · Animalia (Kingdom) > Bryozoa (Phylum) > Gymnolaemata (Class) > Cheilostomatida (Order) > Petraliellidae (Family)

Utinomia
 Utinomia Galkin, 1986 accepted as Galkinius Perreault, 2014 (occupied genus name) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Sessilia (Order) > Pyrgomatidae (Family)
     Utinomia Tomlinson, 1963 accepted as Utinomia Tomlinson, 1963 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Cirripedia (awaiting allocation) (Order) > Cirripedia (awaiting allocation) (Family)
 Utinomia Takeda & Tamura, 1981 accepted as Utinomiella Kropp & Takeda, 1988 · Animalia (Kingdom) > Arthropoda (Phylum) > Malacostraca (Class) > Decapoda (Order) > Cryptochiridae (Family)

Utraria
     Utraria (Quélet) Jeppson & E. Larsson, 2007 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Agaricaceae (Family)
 Utraria Quélet, 1873 accepted as Lycoperdon Persoon, 1801 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Agaricales (Order) > Agaricaceae (Family)

Utriculopsis
     Utriculopsis Sars, 1868 accepted as Utriculopsis M. Sars, 1870 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Cephalaspidea (Order) > Cylichnidae (Family)
 Utriculopsis M. Sars, 1870 accepted as Philine Ascanius, 1772 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Cephalaspidea (Order) > Philinidae (Family)

Utriculus
 Utriculus T. Brown, 1844 accepted as Retusa T. Brown, 1827 (Invalid: junior homonym of Utriculus Schumacher, 1817) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Cephalaspidea (Order) > Retusidae (Family)
 Utriculus Schumacher, 1817 accepted as Conus Linnaeus, 1758 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Conidae (Family)

Uva
 Uva V.P. Maslov, 1956 † accepted as · Plantae (Kingdom) > Chlorophyta (Phylum) > Ulvophyceae (Class) > Bryopsidales (Order) > Codiaceae (Family)
     Uva Gray, 1842 accepted as Uva Gray, 1842 · Animalia (Kingdom) > Chordata (Phylum) > Mammalia (Class) > Mammalia (awaiting allocation) (Order) > Mammalia (awaiting allocation) (Family)
     Uva Playfair, 1914 · Plantae (Kingdom) > Chlorophyta (Phylum) > Chlorophyceae (Class) > Chlamydomonadales (Order) > Spondylomoraceae (Family)
 Uva O. Kuntze, 1891 accepted as Uvaria Linnaeus, 1753 · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Magnoliales (Order) > Annonaceae (Family)

Uxia
     Uxia Walker, 1866 accepted as Uxia Walker, 1866 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Lepidoptera (awaiting allocation) (Family)
 Uxia Jousseaume, 1887 † accepted as Unitas Palmer in Harris & Palmer, 1947 † (invalid: junior homonym of Uxia Walker, 1866 [Lepidoptera]; Unitas is a replacement name) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Neogastropoda (Order) > Cancellariidae (Family)

Uzeliella
     Uzeliella Poppius, 1911 accepted as Uzeliella Poppius, 1911 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Hemiptera (awaiting allocation) (Family)
     Uzeliella Bagnall, 1908 accepted as Uzeliella Bagnall, 1908 (unassessed) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Thysanoptera (Order) > Thysanoptera (awaiting allocation) (Family)