Natura - nature
actualia - actual entities
Mundus Plinius - physical world
naturalia - natural bodies
[crown] 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
[crown] Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
[crown] Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
[crown] 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
Phylum Annelida Lamarck, 1809 - segmented worms
Class Clitellata Michaelsen, 1919
Subclass Hirudinida
Order Rhynchobdellida Blanchard, 1894
Family Glossiphoniidae Vaillant, 1890
Subfamily Haementeriinae Autrum, 1939
Genus Helobdella Blanchard, 1896
01 Helobdella adiastola Ringuelet, 1972
02 Helobdella austinensis Kutschera, Langguth, Kuo, Weisblat & Shankland, 2013
03 Helobdella bowermani Moser, Fend, Richardson, Hammond, Lazo-Wasem, Govedich & Gullo, 2013
04 Helobdella californica Kutschera, 1988
05 Helobdella conchata (Caballero, 1941)
06 Helobdella elongata (Castle, 1900)
07 Helobdella fusca (Castle, 1900)
08 Helobdella lineata (Verrill, 1874)
09 Helobdella modesta (Verrill, 1872)
10 Helobdella moorei Caballero, 1933
11 Helobdella nigropunctata (Dequal, 1917)
12 Helobdella nilae M.M. Negm-Eldin et al., 2000
13 Helobdella papillata (Moore, 1906)
14 Helobdella papillornata Govedich & Davies, 1998
15 Helobdella punctatolineata Moore, 1939
16 Helobdella robusta Shankland, Bissen & Weisblat, 1992
17 Helobdella stagnalis (Linnaeus, 1758)
18 Helobdella transversa Sawyer, 1972
19 Helobdella triserialis (Blanchard, 1849)