Natura - nature
actualia - actual entities
Mundus Plinius - physical world
naturalia - natural bodies
Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Clade neomura Cavalier-Smith, 1987
Domain Eukaryota Chatton, 1925 - eukaryotes
Clade discaria Cavalier-Smith, 2021
Clade dorsates Cavalier-Smith, 2021
Clade podiates Cavalier-Smith, 2012
Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] - animal-fungal clade
Superkingdom Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
Clade filozoa Shalchian-Tabrizi, Minge, Espelund, Orr, Ruden, Jakobsen & Cavalier-Smith, 2008
Kingdom Animalia Linnaeus, 1758 - animals
Clade Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004
Subkingdom Bilateria Hatschek, 1888 - bilaterians
Clade Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
Infrakingdom Protostomia Grobben, 1908
Superphylum Spiralia Schleip, 1929
Clade Platytrochozoa Struck, Wey-Fabrizius, Golombek, Hering, Weigert, Bleidorn, Klebow, Iakovenko, Hausdorf, Petersen, Kück, Herlyn & Hankeln 2014
Clade Lophotrochozoa Halanych, Bacheller, Aguinaldo, Liva, Hillis & Lake 1995 - lophotrochozoans
Clade Trochozoa Beklemischev, 1944 - trochozoans
Clade Tetraneuralia Wanninger 2009
Phylum Mollusca Linnaeus, 1758 - molluscs
Class Caudofoveata Boettger, 1956 - caudofoveatans
Order Chaetodermatida Simroth, 1893
Family Chaetodermatidaeᵀ von Ihering, 1786
Genus Falcidens Salvini-Plawen, 1968
Falcidens aequabilis Salvini-Plawen, 1972
Falcidens afanasjevi (Ivanov, 1986)
Falcidens caudatum (Heath, 1918)
Falcidens crossotus Salvini-Plawen, 1968
Falcidens gutturosus (Kowalevsky, 1901)
Falcidens hartmanae (Schwabl, 1961) - tailed glistenworm
Falcidens hoffmanni (Stork, 1939)
Falcidens ingolfensis Salvini-Plawen, 1971
Falcidens limifossorides Salvini-Plawen, 1992
Falcidens liosquameus Salvini-Plawen, 1969
Falcidens lipurgos Scheltema, 1989
Falcidens longus Scheltema, 1997 - slender glistenworm
Falcidens macrafrondis Scheltema, 1989
Falcidens macranthos Scheltema
Falcidens moskalevi (Ivanov, 1986)
Falcidens normanni (Nierstrasz, 1902)
Falcidens odhneri (Stork, 1941)
Falcidens pellucida (Ivanov, in Scarlato, 1987)
Falcidens poias Scheltema, 1995
Falcidens procerus Salvini-Plawen, 1992
Falcidens profundus Salvini-Plawen, 1968
Falcidens sagittiferus Salvini-Plawen, 1968
Falcidens salviniplaweni (Ivanov, 1984)
Falcidens sterreri (Salvini-Plawen, 1967)
Falcidens thorensis Salvini-Plawen, 1971
Falcidens vasconiensis Salvini-Plawen, 1996
Falcidens wireni (Nierstrasz, 1902)