Intro | Search taxa | Taxon tree | Search literature | Taxon match | Homonyms | Statistics | Webservice | Manual | FAQ | LifeWatch | Download | Log in

Homonyms

IRMNG homonym list - species level - Initial letter = "X" (178)

Note, this list includes both homonyms between codes (which may be valid in both cases) and homonyms within codes, of which in normal circumstances only one will potentially be a valid combination, according to the priority of the relevant genera.
Note also, that homonymy between species epithets in zoology originally established in different genera (even if the latter are themselves homonyms) is to be disregarded under the ICZN Code, Article 57.8.1.



Xandrames latiferaria
     Xandrames latiferaria Hampson, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xandrames latiferaria Walker, 1860 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanterriaria concolor
 Xanterriaria concolor Sjostedt, 1934 accepted as Xanterriaria mediocris (Sjöstedt, 1921) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanterriaria concolor Sjöstedt, 1934 accepted as Xanterriaria mediocris (Sjöstedt, 1921) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthia aurantia
     Xanthia aurantia Tutt, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xanthia aurantia Lempke, 1941 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthia aurantiago
     Xanthia aurantiago Draudt, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xanthia aurantiago Tutt, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthia fasciata
     Xanthia fasciata Kononenko, 1978 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xanthia fasciata Grönblom, 1923 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthia gilvago
     Xanthia gilvago Schiffermüller, 1775 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xanthia gilvago Hübner, 1827 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthia griseosignata
     Xanthia griseosignata Lempke, 1964 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xanthia griseosignata Spuler, 1907 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthia lutea
     Xanthia lutea Tutt, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xanthia lutea Ström, 1783 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthia obsoleta
     Xanthia obsoleta Tutt, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xanthia obsoleta Lempke, 1941 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xanthidium angulatum
     Xanthidium angulatum (W. Joshua) M. Hirano, 1957 · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)
     Xanthidium angulatum (W. Joshua) N.G. Lagerheim, 1887 · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)

Xanthidium coronatum
     Xanthidium coronatum Ehrenberg · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)
     Xanthidium coronatum J. Pavillard · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)

Xanthidium crassipes
     Xanthidium crassipes Ehrenberg ex J. Ralfs · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)
     Xanthidium crassipes H.H. White · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)

Xanthidium hastiferum
     Xanthidium hastiferum G.S. West, 1892 · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)
     Xanthidium hastiferum W.B. Turner · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)

Xanthidium multispinosum
     Xanthidium multispinosum K. Möbius · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)
     Xanthidium multispinosum R.L. Grönblad & H.T. Croasdale · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)

Xanthidium spinosum
     Xanthidium spinosum H.H. White · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)
     Xanthidium spinosum (W. Joshua) W. West & G.S. West · Plantae (Kingdom) > Charophyta (Phylum) > Conjugatophyceae (Class) > Zygnematales (Order) > Desmidiaceae (Family)

Xanthiopyxis globosa
     Xanthiopyxis globosa Ehrenberg † · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > Bacillariophyceae (awaiting allocation) (Order) > Bacillariophyceae (awaiting allocation) (Family)
     Xanthiopyxis globosa Laporte & Lefébure † · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > Bacillariophyceae (awaiting allocation) (Order) > Bacillariophyceae (awaiting allocation) (Family)

Xanthiopyxis hirsuta
     Xanthiopyxis hirsuta (Ehrenberg) Ralfs † · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > Bacillariophyceae (awaiting allocation) (Order) > Bacillariophyceae (awaiting allocation) (Family)
     Xanthiopyxis hirsuta Hanna & Grant † · Chromista (Kingdom) > Ochrophyta (Phylum) > Bacillariophyceae (Class) > Bacillariophyceae (awaiting allocation) (Order) > Bacillariophyceae (awaiting allocation) (Family)

Xanthippus affrictus
 Xanthippus affrictus Hebard, 1929 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus affrictus (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus affrictus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus albulus
 Xanthippus albulus (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus albulus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus altivolus
 Xanthippus altivolus (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus altivolus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus calthulus
 Xanthippus calthulus Kirby, 1910 accepted as Cratypedes lateritius (Saussure, 1884) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus calthulus Saussure, 1884 accepted as Cratypedes lateritius (Saussure, 1884) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus calthulus Strohecker, Middlekauff & Rentz, 1968 accepted as Cratypedes lateritius (Saussure, 1884) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus conspicuus
 Xanthippus conspicuus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus conspicuus (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus cupidus
 Xanthippus cupidus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus cupidus (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus eremitus
 Xanthippus eremitus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus eremitus (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus glaucipes
 Xanthippus glaucipes Caudell, 1911 accepted as Cratypedes neglectus (Thomas, C., 1870) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus glaucipes Kirby, 1910 accepted as Cratypedes neglectus (Thomas, C., 1870) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus latefasciatus
 Xanthippus latefasciatus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus latefasciatus (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus leprosus
 Xanthippus leprosus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus leprosus Saussure, 1884 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus maculatus
 Xanthippus maculatus (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus maculatus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus pardalina
 Xanthippus pardalina Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus pardalina (Saussure, 1861) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus pumilis
 Xanthippus pumilis (Scudder, 1892) accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus pumilis Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus sierra
 Xanthippus sierra Kirby, 1910 accepted as Cratypedes lateritius (Saussure, 1884) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus sierra Strohecker, Middlekauff & Rentz, 1968 accepted as Cratypedes lateritius (Saussure, 1884) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus toltecus
 Xanthippus toltecus Saussure, 1884 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus toltecus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus vitellinus
 Xanthippus vitellinus Saussure, 1884 accepted as Agymnastus ingens (Scudder, 1877) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus vitellinus Kirby, 1910 accepted as Agymnastus ingens (Scudder, 1877) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthippus zapotecus
 Xanthippus zapotecus Caudell, 1911 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus zapotecus Saussure, 1884 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)
 Xanthippus zapotecus Kirby, 1910 accepted as Xanthippus corallipes (Haldeman, 1852) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Acrididae (Family)

Xanthocalanus simplex
     Xanthocalanus simplex Aurivillius, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Phaennidae (Family)
 Xanthocalanus simplex Wolfenden, 1906 accepted as Undinella simplex (Wolfenden, 1906) · Animalia (Kingdom) > Arthropoda (Phylum) > Maxillopoda (Class) > Calanoida (Order) > Phaennidae (Family)

Xanthochrous circinatus
 Xanthochrous circinatus (Fr.) Bourdot & Galzin, 1925 accepted as Onnia circinata (Fr.) P. Karst., 1889 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Hymenochaetales (Order) > Hymenochaetaceae (Family)
 Xanthochrous circinatus (Fr.) Pat., 1900 accepted as Onnia circinata (Fr.) P. Karst., 1889 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Hymenochaetales (Order) > Hymenochaetaceae (Family)

Xanthochrous montagnei
 Xanthochrous montagnei (Quél.) Bourdot & Galzin, 1925 accepted as Coltricia montagnei (Fr.) Murrill, 1920 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Hymenochaetales (Order) > Hymenochaetaceae (Family)
 Xanthochrous montagnei (Fr.) Pat., 1900 accepted as Coltricia montagnei (Fr.) Murrill, 1920 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Hymenochaetales (Order) > Hymenochaetaceae (Family)

Xanthomonas cassavae
     Xanthomonas cassavae (ex Wiehe & Dowson 1953) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas cassavae Wiehe & Dowson, 1953 accepted as Xanthomonas cassavae (ex Wiehe & Dowson 1953) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas citri
     Xanthomonas citri (ex Hasse 1915) Gabriel et al., 1989 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas citri (Hasse, 1915) Dowson, 1939 accepted as Xanthomonas citri (ex Hasse 1915) Gabriel et al., 1989 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas cucurbitae
     Xanthomonas cucurbitae (ex Bryan 1926) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas cucurbitae Bryan, 1926 accepted as Xanthomonas cucurbitae (ex Bryan 1926) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas hyacinthi
     Xanthomonas hyacinthi (ex Wakker, 1883) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas hyacinthi Wakker, 1883 accepted as Xanthomonas hyacinthi (ex Wakker, 1883) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas maltophilia
     Xanthomonas maltophilia (Hugh 1981) Swings et al., 1983 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas maltophilia (Hugh, 1981) Swings et al., 1983 accepted as Stenotrophomonas maltophilia (Hugh 1981) Palleroni & Bradbury, 1993 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas oryzae
     Xanthomonas oryzae (ex Ishiyama 1922) Swings et al., 1990 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas oryzae (Uyeda & Ishiyama, 1926) Dowson, 1943 accepted as Xanthomonas oryzae (ex Ishiyama 1922) Swings et al., 1990 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas phaseoli
     Xanthomonas phaseoli (ex Smith, 1897) Gabriel et al., 1989 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas phaseoli (Smith, 1897) Dowson, 1939 accepted as Xanthomonas phaseoli (ex Smith, 1897) Gabriel et al., 1989 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas pisi
     Xanthomonas pisi (ex Goto & Okabe 1958) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas pisi Goto & Okabe, 1958 accepted as Xanthomonas pisi (ex Goto & Okabe 1958) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas populi
     Xanthomonas populi (ex Ridé, 1958) Ridé & Ridé, 1992 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
     Xanthomonas populi (ex Ridé, 1958) van den Mooter & Swings, 1990 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas populi (Ridé, 1958) Ridé & Ridé, 1978 accepted as Xanthomonas populi (ex Ridé, 1958) Ridé & Ridé, 1992 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas rhapontica
 Xanthomonas rhapontica (Millard, 1924) Savulescu, 1947 accepted as Pectobacterium rhapontici (Millard 1924) Patel & Kulkarni, 1951 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas rhapontica (Millard, 1924) Savulescu, 1947 accepted as Erwinia rhapontici (Millard 1924) Burkholder, 1948 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas translucens
     Xanthomonas translucens (ex Jones et al. 1917) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas translucens Jones et al., 1917 accepted as Xanthomonas translucens (ex Jones et al. 1917) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthomonas vesicatoria
     Xanthomonas vesicatoria (ex Doidge 1920) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)
 Xanthomonas vesicatoria Doidge, 1920 accepted as Xanthomonas vesicatoria (ex Doidge 1920) Vauterin et al., 1995 · Bacteria (Kingdom) > Proteobacteria (Phylum) > Gammaproteobacteria (Class) > Lysobacterales (Order) > Lysobacteraceae (Family)

Xanthorhoe algidata
     Xanthorhoe algidata Culot, 1919 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe algidata Turner, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe algidata Staudinger, 1901 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe coarctata
     Xanthorhoe coarctata Prout, 1914 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe coarctata Prout, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe coarctata Cockayne, 1953 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe coarctata Prout, 1894 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe corculata
     Xanthorhoe corculata Prout, 1894 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe corculata Hüfnagel, 1767 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe curcumata
     Xanthorhoe curcumata Moore, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe curcumata Hampson, 1895 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe defasciata
     Xanthorhoe defasciata Cockayne, 1953 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe defasciata Prout, 1914 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe degenerata
     Xanthorhoe degenerata Lempke, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe degenerata Prout, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe dissociata
     Xanthorhoe dissociata Warren, 1897 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe dissociata Walker, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe divisa
     Xanthorhoe divisa Osthelder, 1929 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe divisa Prout, 1937 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe divisa Lempke, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe divisata
     Xanthorhoe divisata Walker, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe divisata Walker, 1866 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe ferrugata
     Xanthorhoe ferrugata Prout, 1937 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe ferrugata Clerck, 1759 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe ferrugata Staudinger, 1901 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe fluctuata
     Xanthorhoe fluctuata Linnaeus, 1758 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe fluctuata Packard, 1876 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe fumata
     Xanthorhoe fumata Smith, 1954 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe fumata Cockayne, 1953 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe fuscata
     Xanthorhoe fuscata Nordström, 1935 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe fuscata Prout, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe interrupta
     Xanthorhoe interrupta Hann., 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe interrupta Prout, 1937 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe labradorensis
     Xanthorhoe labradorensis Packard, 1867 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe labradorensis McDunnough, 1933 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe lucidata
     Xanthorhoe lucidata Walker, 1862 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe lucidata Hudson, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe lutescens
     Xanthorhoe lutescens Lempke, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe lutescens Wagner, 1926 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe nigrofasciata
     Xanthorhoe nigrofasciata Packard, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe nigrofasciata Osthelder, 1929 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe nigrofasciata Djakonov, 1929 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe nigrofasciata Djakonov, 1926 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe obarata
     Xanthorhoe obarata Felder, 1875 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe obarata Meyrick, 1884 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe obscura
     Xanthorhoe obscura Philpott, 1921 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe obscura Dahl, 1900 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe obscura Lempke, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe obscura Butler, 1882 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe quadrifasciaria
     Xanthorhoe quadrifasciaria Linnaeus, 1761 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe quadrifasciaria Treitschke, 1828 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe radiata
     Xanthorhoe radiata Cockayne, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe radiata Dioszeghy, 1924 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe reduplicata
     Xanthorhoe reduplicata Heinrich, 1916 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe reduplicata Heinrich · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe rosearia
     Xanthorhoe rosearia Doubleday, 1843 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe rosearia Meyrick, 1902 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe saturata
     Xanthorhoe saturata Guenée, 1857 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe saturata Janse, 1917 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe stenotaenia
     Xanthorhoe stenotaenia Kautz, 1923 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe stenotaenia Dannehl, 1933 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe thedenii
     Xanthorhoe thedenii Prout, 1914 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe thedenii Lampa, 1885 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe undulata
     Xanthorhoe undulata Prout, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe undulata Philpott, 1913 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthorhoe unicolor
     Xanthorhoe unicolor Rebel, 1910 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xanthorhoe unicolor Lempke, 1950 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xanthoria candelaria
     Xanthoria candelaria (L.) Th. Fr., 1861 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Teloschistaceae (Family)
 Xanthoria candelaria sensu auct. brit.p.p. accepted as Xanthoria ulophyllodes Räsänen, 1931 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Teloschistaceae (Family)
 Xanthoria candelaria sensu auct. brit.p.p. accepted as Xanthoria ucrainica S.Y. Kondr., 1997 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Teloschistaceae (Family)
 Xanthoria candelaria sensu auct. brit.p.p. accepted as Xanthoria fulva (Hoffm.) Poelt & Petut., 1992 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Teloschistaceae (Family)

Xanthoria lychnea
 Xanthoria lychnea sensu auct. brit.p.p. accepted as Xanthoria fulva (Hoffm.) Poelt & Petut., 1992 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Teloschistaceae (Family)
 Xanthoria lychnea (Ach.) Th. Fr., 1871 accepted as Xanthoria candelaria (L.) Th. Fr., 1861 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Teloschistaceae (Family)

Xanthoria parietina
     Xanthoria parietina (L.) Th. Fr., 1860 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Teloschistaceae (Family)
     Xanthoria parietina (L.) Beltr., 1858 · Fungi (Kingdom) > Ascomycota (Phylum) > Lecanoromycetes (Class) > Teloschistales (Order) > Teloschistaceae (Family)

Xanthosoma jacquinii
 Xanthosoma jacquinii Schott accepted as Xanthosoma undipes (K. Koch & C.D. Bouché) K. Koch · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Araceae (Family)
 Xanthosoma jacquinii Schott accepted as Xanthosoma sagittifolium (L.) Schott · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Araceae (Family)

Xanthosoma sagittifolium
     Xanthosoma sagittifolium (L.) Schott · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Araceae (Family)
 Xanthosoma sagittifolium K. Koch accepted as Xanthosoma sagittifolium (L.) Schott · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Araceae (Family)
 Xanthosoma sagittifolium Liebm. accepted as Xanthosoma undipes (K. Koch & C.D. Bouché) K. Koch · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Alismatales (Order) > Araceae (Family)

Xanthotrichum contortum
     Xanthotrichum contortum Wille · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Oscillatoriales (Order) > Microcoleaceae (Family)
 Xanthotrichum contortum N. Wille ex O. Kirchner, 1893 accepted as Trichodesmium contortum (Wille) Wille, 1903 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Oscillatoriales (Order) > Microcoleaceae (Family)

Xenasmatella tulasnelloidea
 Xenasmatella tulasnelloidea (Höhn. & Litsch.) Oberw. ex Jülich, 1979 accepted as Xenasma tulasnelloideum (Höhn. & Litsch.) Donk, 1957 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Xenasmataceae (Family)
 Xenasmatella tulasnelloidea (Höhn. & Litsch.) Oberw., 1965 accepted as Xenasma tulasnelloideum (Höhn. & Litsch.) Donk, 1957 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Xenasmataceae (Family)

Xenillus punctulatus
     Xenillus punctulatus (Banks, 1895) · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Oribatida (Order) > Liacaridae (Family)
     Xenillus punctulatus Balogh & Balogh, 1985 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Oribatida (Order) > Liacaridae (Family)

Xenochironomus loripes
     Xenochironomus loripes Guha & Chaudhuri, 1981 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)
     Xenochironomus loripes Guha & Chaudhuri, 1980 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Chironomidae (Family)

Xenochrophis piscator
     Xenochrophis piscator Schneider, 1799 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
 Xenochrophis piscator Malnate & Minton, 1965 accepted as Xenochrophis flavipunctatus Hallowell, 1860 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)

Xenococcus violaceus
     Xenococcus violaceus Anand, 1937 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Chroococcales (Order) > Xenococcaceae (Family)
 Xenococcus violaceus Yoneda, 1942 accepted as Xenococcus yonedae I. Umezaki & M. Watanabe, 1994 · Bacteria (Kingdom) > Cyanobacteria (Phylum) > Cyanophyceae (Class) > Chroococcales (Order) > Xenococcaceae (Family)

Xenodon colubrinus
 Xenodon colubrinus Günther, 1858 accepted as Xenodon rabdocephalus Wied, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)
 Xenodon colubrinus Wucherer, 1862 accepted as Xenodon rabdocephalus Wied, 1824 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Colubridae (Family)

Xenoibidion unicolor
     Xenoibidion unicolor White, 1855 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xenoibidion unicolor Martins, 1968 accepted as Aposphaerion unicolor (White, 1855) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xenophora mekranensis
     Xenophora mekranensis Habe, 1953 · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Xenophoridae (Family)
     Xenophora mekranensis (Newton, 1905) · Animalia (Kingdom) > Mollusca (Phylum) > Gastropoda (Class) > Littorinimorpha (Order) > Xenophoridae (Family)

Xenortholitha niphonica
     Xenortholitha niphonica Prout, 1914 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)
     Xenortholitha niphonica Butler, 1878 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Geometridae (Family)

Xenosaurus platyceps
     Xenosaurus platyceps King & Thompson, 1968 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Xenosauridae (Family)
 Xenosaurus platyceps Smith & Iverson, 1993 accepted as Xenosaurus rectocollaris Smith & Iverson, 1993 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Xenosauridae (Family)

Xerocomus communis
 Xerocomus communis sensu Bon, auct. accepted as Boletus declivitatus (C. Martín) Watling, 2004 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)
 Xerocomus communis (Bull.) Bon, 1985 accepted as Boletus chrysenteron Bull., 1791 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)

Xerocomus leonis
 Xerocomus leonis (D.A. Reid) Bon, 1985 accepted as Boletus moravicus Vacek, 1946 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)
 Xerocomus leonis (D.A. Reid) Alessio, 1985 accepted as Boletus moravicus Vacek, 1946 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)

Xerocomus porosporus
 Xerocomus porosporus (Imler ex Bon & G. Moreno) Contu, 1990 accepted as Boletus porosporus (Imler) Watling, 1968 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)
 Xerocomus porosporus Imler, 1958 accepted as Boletus porosporus (Imler) Watling, 1968 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)

Xerocomus xanthus
 Xerocomus xanthus (E.-J. Gilbert) Contu, 1989 accepted as Boletus subtomentosus Linnaeus, 1753 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)
 Xerocomus xanthus (E.-J. Gilbert) Curreli, 1989 accepted as Boletus subtomentosus Linnaeus, 1753 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Boletales (Order) > Boletaceae (Family)

Xerophyllum servillei
 Xerophyllum servillei Rehn, 1930 accepted as Xerophyllum platycorys (Westwood, 1839) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tetrigidae (Family)
 Xerophyllum servillei Fairmaire, 1846 accepted as Xerophyllum platycorys (Westwood, 1839) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tetrigidae (Family)
 Xerophyllum servillei Gunther, Klaus, 1938 accepted as Xerophyllum platycorys (Westwood, 1839) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tetrigidae (Family)

Xerotus degener
 Xerotus degener sensu auct. accepted as Faerberia carbonaria (Alb. & Schwein.) Pouzar, 1981 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Polyporaceae (Family)
 Xerotus degener sensu auct. accepted as Neolentinus schaefferi (Weinm.) Redhead & Ginns, 1985 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Polyporales (Order) > Polyporaceae (Family)

Xestia albida
     Xestia albida Ribbe, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xestia albida Cockayne, 1952 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xestia brevipennis
     Xestia brevipennis Lempke, 1962 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
 Xestia brevipennis Bates, 1870 accepted as Coleoxestia brevipennis (Bates, 1870) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xestia cinerascens
     Xestia cinerascens Lempke, 1962 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xestia cinerascens Smith, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xestia meridionalis
     Xestia meridionalis Staudinger · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xestia meridionalis Spuler, 1905 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xestia nitida
 Xestia nitida Bates, 1872 accepted as Coleoxestia nitida (Bates, 1872) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xestia nitida Gemminger & Harold, 1872 accepted as Coleoxestia nitida (Bates, 1872) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xestia obscura
     Xestia obscura Zolotarenko, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xestia obscura Tutt, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xestia ochrotaenia
 Xestia ochrotaenia Bates, 1872 accepted as Poeciloxestia ochrotaenia (Bates, 1870) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xestia ochrotaenia Gemminger & Harold, 1872 accepted as Poeciloxestia ochrotaenia (Bates, 1870) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xestia pallida
     Xestia pallida Fernandez, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xestia pallida Turner, 1939 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xestia pallida Schwingenschuss, 1918 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xestia pallida Tutt, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xestia pilosovittata
 Xestia pilosovittata Gemminger & Harold, 1872 accepted as Sphallenopsis pilosovittata (Bates, 1872) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xestia pilosovittata Bates, 1872 accepted as Sphallenopsis pilosovittata (Bates, 1872) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xestia rosea
     Xestia rosea Tutt, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xestia rosea Schwingenschuss, 1935 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xestia sagittaria
 Xestia sagittaria Gemminger & Harold, 1872 accepted as Poeciloxestia sagittaria (Bates, 1872) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xestia sagittaria Bates, 1872 accepted as Poeciloxestia sagittaria (Bates, 1872) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xestospongia variabilis
     Xestospongia variabilis (Ridley, 1884) · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Petrosiida (Order) > Petrosiidae (Family)
     Xestospongia variabilis (Topsent, 1892) · Animalia (Kingdom) > Porifera (Phylum) > Demospongea (Class) > Petrosiida (Order) > Petrosiidae (Family)

Xiphias velifer
 Xiphias velifer Bloch & Schneider, 1801 accepted as Istiophorus platypterus (Shaw, 1792) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Xiphiidae (Family)
 Xiphias velifer Bloch & Schneider, 1801 accepted as Istiophorus albicans (Latreille, 1804) · Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Perciformes (Order) > Xiphiidae (Family)

Xiphidiola nigrospinosa
 Xiphidiola nigrospinosa Paris, 1994 accepted as Xiphidiola aliquantula (Karsch, F., 1893) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
 Xiphidiola nigrospinosa Bolivar, I., 1906 accepted as Xiphidiola aliquantula (Karsch, F., 1893) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)

Xiphidiopsis hebardi
     Xiphidiopsis hebardi Karny, 1924 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)
 Xiphidiopsis hebardi Tinkham, 1956 accepted as Eoxizicus tinkhami (Bei-Bienko, 1962) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tettigoniidae (Family)

Xiphinema brasiliense
 Xiphinema brasiliense Lordello & Da Costa, 1961 accepted as Radiphinema brasiliense (Lordello, 1951) · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Longidoridae (Family)
 Xiphinema brasiliense Lordello, 1951 accepted as Radiphinema brasiliense (Lordello, 1951) · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Longidoridae (Family)

Xiphinema clavatum
 Xiphinema clavatum Renubala, Gambhir & Dhanachand, 1991 accepted as Xiphinema radicicola T. Goodey, 1936 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Longidoridae (Family)
 Xiphinema clavatum Heyns, 1965 accepted as Rotundiphinema clavatum (Heyns, 1965) · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Longidoridae (Family)

Xiphinema luci
     Xiphinema luci Lamberti & Bleve Zacheo, 1979 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Longidoridae (Family)
 Xiphinema luci Bajaj & Jairajpuri, 1979 accepted as Xiphinema bajaji Jairajpuri & Lamberti, 1980 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Longidoridae (Family)

Xiphinema parvum
     Xiphinema parvum Lamberti, Ciancio, Agostinelli & Coiro, 1991 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Longidoridae (Family)
 Xiphinema parvum Lamberti & Bleve Zacheo, 1979 accepted as Xiphinema brevicollum Lordello & Da Costa, 1961 · Animalia (Kingdom) > Nematoda (Phylum) > Dorylaimea (Class) > Dorylaimida (Order) > Longidoridae (Family)

Xiphoscelis gariepena
     Xiphoscelis gariepena Gory & Percheron, 1833 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)
 Xiphoscelis gariepena Schaum, 1849 accepted as Xiphoscelis schuckardi Burmeister, 1842 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Scarabaeidae (Family)

Xiphosoma ruschenbergerii
 Xiphosoma ruschenbergerii Cope, 1876 accepted as Corallus ruschenbergerii Cope, 1876 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Boidae (Family)
 Xiphosoma ruschenbergerii Cope, 1875 accepted as Corallus hortulanus Linnaeus, 1758 · Animalia (Kingdom) > Chordata (Phylum) > Reptilia (Class) > Squamata (Order) > Boidae (Family)

Xistrella javanensis
     Xistrella javanensis (Günther, Klaus, 1937) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tetrigidae (Family)
 Xistrella javanensis Gunther, Klaus, 1939 accepted as Xistrella acuteterminata (Brunner von Wattenwyl, 1893) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Tetrigidae (Family)

Xoanodera striata
 Xoanodera striata Hüdepohl, 1988 accepted as Xoanodera asphyxa Franz, 1972 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Xoanodera striata Gressitt & Rondon, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xoanodera vitticollis
     Xoanodera vitticollis Gahan, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
     Xoanodera vitticollis Gahan, 1891 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xyala imparis
     Xyala imparis Boucher & Helléouët, 1977 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Monhysterida (Order) > Xyalidae (Family)
     Xyala imparis Vincx, 1988 · Animalia (Kingdom) > Nematoda (Phylum) > Chromadorea (Class) > Monhysterida (Order) > Xyalidae (Family)

Xylena suffusa
     Xylena suffusa Lambillion, 1928 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)
     Xylena suffusa Tutt, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Noctuidae (Family)

Xylergates lacteus
     Xylergates lacteus Bates, 1864 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylergates lacteus Silva et al., 1968 accepted as Xylergates elaineae Gilmour, 1962 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xyletinus cylindricus
     Xyletinus cylindricus Kofler, 1970 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)
 Xyletinus cylindricus Germar accepted as Metholcus cylindricus (Germar) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Ptinidae (Family)

Xyleus centralis
 Xyleus centralis Descamps, M., 1975 accepted as Xyleus discoideus (Serville, 1831) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)
 Xyleus centralis Rehn & Grant, 1959 accepted as Xyleus discoideus (Serville, 1831) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)

Xyleus conspersus
 Xyleus conspersus Carbonell, C.S., 2004 accepted as Xyleus insignis (Giglio-Tos, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)
 Xyleus conspersus (Bruner, 1900) accepted as Xyleus insignis (Giglio-Tos, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)

Xyleus panteli
 Xyleus panteli (Bolivar, I., 1902) accepted as Xyleus modestus (Giglio-Tos, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)
 Xyleus panteli Otte, D., 1995 accepted as Xyleus modestus (Giglio-Tos, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)

Xyleus parvus
 Xyleus parvus (Bolivar, I., 1909) accepted as Xyleus regularis (Bruner, 1905) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)
 Xyleus parvus Carbonell, C.S., 2004 accepted as Xyleus regularis (Bruner, 1905) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)

Xyleus strigatus
 Xyleus strigatus (Bruner, 1910) accepted as Xyleus modestus (Giglio-Tos, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)
 Xyleus strigatus Carbonell, C.S., 2004 accepted as Xyleus modestus (Giglio-Tos, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Orthoptera (Order) > Romaleidae (Family)

Xylia africana
     Xylia africana Harms · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Xylia africana sensu Torre accepted as Xylia torreana Brenan · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Xylia dolabriformis
 Xylia dolabriformis sensu auct., non Benth. accepted as Albizia acle (Blanco) Merr. · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)
 Xylia dolabriformis Benth. accepted as Xylia xylocarpa (Roxb.) Taub. · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Fabales (Order) > Fabaceae (Family)

Xylococcus alni
 Xylococcus alni Oguma, 1919 accepted as Xylococcus japonicus Oguma, 1926 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)
 Xylococcus alni Florence, 1917 accepted as Xylococculus betulae (Pergande, 1898) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)

Xylococcus matsumurae
 Xylococcus matsumurae Kuwana, 1905 accepted as Matsucoccus matsumurae (Kuwana, 1905) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)
 Xylococcus matsumurae Kuwana, 1907 accepted as Matsucoccus matsumurae (Kuwana, 1905) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)

Xylococcus napiformis
 Xylococcus napiformis Danzig, 1980 accepted as Xylococcus quercicola Danzig, 1980 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)
 Xylococcus napiformis Kuwana, 1914 accepted as Beesonia napiformis (Kuwana, 1914) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)
 Xylococcus napiformis Danzig, 1972 accepted as Xylococcus quercicola Danzig, 1980 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Hemiptera (Order) > Margarodidae (Family)

Xylodon farinaceus
 Xylodon farinaceus (Fr.) Kuntze, 1898 accepted as Fuscocerrena portoricensis (Fr.) Ryvarden, 1982 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Hymenochaetales (Order) > Schizoporaceae (Family)
 Xylodon farinaceus (Pers.) Chevall., 1826 accepted as Trechispora farinacea (Pers.) Liberta, 1966 · Fungi (Kingdom) > Basidiomycota (Phylum) > Agaricomycetes (Class) > Hymenochaetales (Order) > Schizoporaceae (Family)

Xyloma ulmeum
 Xyloma ulmeum Mart., 1817 accepted as Platychora ulmi (Schleich.) Petr., 1925 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Rhytismatales (Order) > Rhytismataceae (Family)
 Xyloma ulmeum Schwein., 1822 accepted as Gnomonia ulmea (Schwein.) Thüm., 1878 · Fungi (Kingdom) > Ascomycota (Phylum) > Leotiomycetes (Class) > Rhytismatales (Order) > Rhytismataceae (Family)

Xylomyia nigriventris
     Xylomyia nigriventris Brunetti, 1923 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Xylomyidae (Family)
 Xylomyia nigriventris Meijere, 1924 accepted as Solva meijerei Nagatomi, 1975 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Xylomyidae (Family)

Xylophagus maculatus
     Xylophagus maculatus Meigen, 1804 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Xylophagidae (Family)
 Xylophagus maculatus Matsumura, 1916 accepted as Xylophagus matsumurai Miyatake, 1965 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Xylophagidae (Family)

Xylophanes aglaor
     Xylophanes aglaor Boisduval, 1875 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes aglaor Boisduval · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes anubus
     Xylophanes anubus Cramer, 1777 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes anubus Walker, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes aristor
     Xylophanes aristor Burmeister, 1878 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes aristor Butler, 1877 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes aristor Boisduval, 1870 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes ceratomioides
     Xylophanes ceratomioides Grote & Robinson, 1867 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes ceratomioides Druce, 1881 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes chiron
     Xylophanes chiron Drury, 1771 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes chiron Walker, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes docilis
     Xylophanes docilis Butler, 1875 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes docilis Druce, 1896 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes drucei
     Xylophanes drucei Kirby, 1892 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes drucei Rothschild, 1894 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes epaphus
     Xylophanes epaphus Boisduval, 1875 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes epaphus Schaus, 1898 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes falco
     Xylophanes falco Walker · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes falco Walker, 1856 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes irrorata
     Xylophanes irrorata Grote, 1865 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes irrorata Rothschild, 1894 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes mexicana
     Xylophanes mexicana Schaus, 1890 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes mexicana Erschoff, 1877 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes nechus
     Xylophanes nechus Butler, 1877 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes nechus Cramer, 1777 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes neoptolemus
     Xylophanes neoptolemus Bönninghausen, 1899 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes neoptolemus · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes neoptolemus Stoll, 1782 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophanes rhabdotus
     Xylophanes rhabdotus Oberthür, 1911 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)
     Xylophanes rhabdotus Oberthür, 1904 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Sphingidae (Family)

Xylophilus bicolor
 Xylophilus bicolor Schaufuss, 1882 accepted as Otolelus neglectus (Jacquelin du Duval, 1863) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)
 Xylophilus bicolor Champion, 1890 accepted as Aderus championi (Pic, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)

Xylophilus fasciatus
 Xylophilus fasciatus Boheman, 1858 accepted as Syzeton undatus Gemminger, 1870 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)
 Xylophilus fasciatus Melsheimer, 1846 accepted as Aderus fasciatus (Melsheimer, 1846) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)

Xylophilus humeralis
 Xylophilus humeralis Favre, 1890 accepted as Otolelus neglectus (Jacquelin du Duval, 1863) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)
 Xylophilus humeralis Champion, 1890 accepted as Aderus humeralis (Champion, 1890) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)

Xylophilus sefrensis
 Xylophilus sefrensis Pic, 1894 accepted as Anidorus sefrensis (Pic, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)
 Xylophilus sefrensis Pic, 18941 accepted as Anidorus sefrensis (Pic, 1894) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Aderidae (Family)

Xylophylla ensifolia
     Xylophylla ensifolia Bojer ex Baker · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)
     Xylophylla ensifolia Bojer ex Drake · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)

Xylophylla epiphyllanthus
 Xylophylla epiphyllanthus Britton accepted as Phyllanthus epiphyllanthus Linnaeus · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)
 Xylophylla epiphyllanthus (L.) Hornem. accepted as Phyllanthus epiphyllanthus Linnaeus · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Malpighiales (Order) > Phyllanthaceae (Family)

Xylorycta thrasycosma
     Xylorycta thrasycosma Meyrick, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)
     Xylorycta thrasycosma Tillyard, 1926 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Lepidoptera (Order) > Oecophoridae (Family)

Xylota annulipes
     Xylota annulipes Meijere, 1924 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
 Xylota annulipes Shiraki, 1968 accepted as Chalcosyrphus shirakii Hippa, 1985 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)

Xylota atricoloris
     Xylota atricoloris Mutin, 1987 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
     Xylota atricoloris Mutin, 1991 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)

Xylota cuprina
     Xylota cuprina Bigot, 1885 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
 Xylota cuprina Coquillett, 1898 accepted as Xylota coquilletti Herve-Bazin, 1915 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)

Xylota silvicola
     Xylota silvicola Mutin, 1987 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
     Xylota silvicola Mutin, 1991 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)

Xylota spinipes
     Xylota spinipes Curran, 1928 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)
 Xylota spinipes Shiraki, 1930 accepted as Xylota steyskali Thompson, 1975 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Diptera (Order) > Syrphidae (Family)

Xylotrechus fuscus
 Xylotrechus fuscus Thomson, 1860 accepted as Xylotrechus undulatus (Say, 1824) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus fuscus Nicolay, 1917 accepted as Xylotrechus integer (Haldeman, 1847) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xylotrechus mormonus
     Xylotrechus mormonus (LeConte, 1861) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus mormonus Hopping, 1932 accepted as · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xylotrechus obliteratus
     Xylotrechus obliteratus LeConte, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus obliteratus Hopping, 1932 accepted as · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus obliteratus Leng, 1887 accepted as Xylotrechus insignis LeConte, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xylotrechus planifrons
 Xylotrechus planifrons LeConte, 1874 accepted as Clytus planifrons (LeConte, 1874) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus planifrons Fall, 1901 accepted as Xylotrechus insignis LeConte, 1873 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xylotrechus quadrimaculatus
     Xylotrechus quadrimaculatus (Haldeman, 1847) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus quadrimaculatus Fisher & Kirk, 1912 accepted as Xylotrechus aceris Fisher, 1916 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xylotrechus quadripes
     Xylotrechus quadripes Chevrolat, 1863 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus quadripes Fletcher, 1914 accepted as Xylotrechus javanicus (Castelnau & Gory, 1841) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xylotrechus undulatus
     Xylotrechus undulatus (Say, 1824) · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus undulatus Hardy & Preece, 1926 accepted as Xylotrechus longitarsis Casey, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)
 Xylotrechus undulatus Hardy, 1926 accepted as Xylotrechus longitarsis Casey, 1912 · Animalia (Kingdom) > Arthropoda (Phylum) > Insecta (Class) > Coleoptera (Order) > Cerambycidae (Family)

Xyris arenicola
 Xyris arenicola Small accepted as Xyris caroliniana Walt. · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Xyridaceae (Family)
 Xyris arenicola Miq. accepted as Xyris jupicai L.C. Rich. · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Xyridaceae (Family)

Xyris flexuosa
 Xyris flexuosa Chapman accepted as Xyris torta Sm. · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Xyridaceae (Family)
 Xyris flexuosa Muhl. ex Ell. accepted as Xyris caroliniana Walt. · Plantae (Kingdom) > Tracheophyta (Phylum) > Magnoliopsida (Class) > Poales (Order) > Xyridaceae (Family)

Xysticus fagei
     Xysticus fagei Lessert, 1919 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Thomisidae (Family)
     Xysticus fagei Schenkel, 1963 · Animalia (Kingdom) > Arthropoda (Phylum) > Arachnida (Class) > Araneae (Order) > Thomisidae (Family)