Between brackets is the number of accepted species
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- Biota
- Kingdom Animalia
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Phylum Acritarcha †
- Phylum Algae (awaiting allocation)
- Phylum Algae incertae sedis
- Phylum Anthocerotophyta
- Phylum Bryophyta
- Phylum Calcitarcha †
- Phylum Charophyta
- Phylum Chlorophyta
- Phylum Eophyta †
- Phylum Glaucophyta
- Phylum Gymnospermophyta accepted as Tracheophyta
- Phylum Horneophyta †
- Phylum Magnoliophyta accepted as Tracheophyta
- Phylum Marchantiophyta
- Class Haplomitriopsida
- Class Jungermanniopsida
- Order Fossombroniales
- Order Jungermanniales
- Order Metzgeriales
- Order Pallaviciniales
- Family Hymenophytaceae
- Family Moerckiaceae B.J. Crandall-Stotler, 2007
- Family Pallaviciniaceae
- Genus Amphibiophytum H. Karsten, 1859
- Genus Blytia Endlicher, 1840
- Genus Cordaea C.G.D. Nees, 1833
- Genus Dilaena Dumortier, 1822
- Genus Diplomitrion Corda in Opiz, 1829
- Genus Greeneothallus G.G. Hässel de Menéndez, 1980 †
- Genus Hattorianthus Schuster & Inoue, 1975
- Genus Hollia Endlicher, 1842 accepted as Pallavicinia S.F. Gray, 1821
- Genus Hypoblyttia Gottsche, 1857
- Genus Jensenia S.O. Lindberg, 1867
- Genus Kormickia Stephani, 1917
- Genus Makednothallus Verdoorn, 1932
- Genus Mittenia Gottsche, 1864
- Genus Pallavicinia S.F. Gray, 1821
- Genus Pallavicinius S.F. Gray, 1821 accepted as Pallavicinia S.F. Gray, 1821
- Genus Seppeltia R. Grolle in R. Grolle & R.D. Seppelt, 1986
- Genus Solenochaetium Trevisan, 1877
- Genus Steetzia J.G.C. Lehmann, 1846
- Species Steetzia cylindrica Austin accepted as Pallavicinia lyellii (Hook.) Carruth.
- Species Steetzia lyellii (Hook.) Lehm. accepted as Pallavicinia lyellii (Hook.) Carruth.
- Genus Strozzia Trevisan, 1877
- Genus Symphyogyna C.G.D. Nees & Montagne, 1836
- Genus Systasis Griffith, 1849
- Genus Thedenia E.M. Fries, 1842
- Genus Viviana Raddi, 1822 accepted as Viviania Raddi, 1822
- Genus Viviania Raddi, 1822
- Genus Wuestneia H. Brockmüller, 1863
- Genus Xenothallus Schuster, 1963
- Family Phyllothalliaceae
- Family Pseudomoerckiaceae A.A. Vilnet, N.A. Konstantinova, D.G. Long, N. Lockhart & Y.S. Mamontov in Konstantinova et al., 2021
- Family Sandeothallaceae
- Order Pelliales
- Order Pleuroziales
- Order Porellales
- Order Ptilidiales
- Family Appianaceae C.M. Steenbock, R.A. Stockey, G. Beard & A.M.F. Tomescu, 2011 †
- Class Marchantiophyta (awaiting allocation)
- Class Marchantiopsida
- Phylum Picozoa
- Phylum Plantae (awaiting allocation)
- Phylum Prasinodermatophyta
- Phylum Pteridophyta accepted as Tracheophyta
- Phylum Rhodelphidia
- Phylum Rhodophyta
- Phylum Sporae dispersae †
- Phylum Tracheophyta
- Phylum Vendophyta † accepted as Algae incertae sedis
- Class Nematophyceae † accepted as Nematophyta †
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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