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 Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake, 1997
Panarthropoda Nielsen, 1995 - panarthropods
Tactopoda Budd, 2001
Phylum Arthropoda Siebold, 1848 - arthropods
Euarthropoda
Subphylum Chelicerata Heymons, 1901
Class Pycnogonida Latreille, 1810 - pycnogonids
Order Pantopoda Gerstaecker, 1863
Suborder Eupantopodida Fry, 1978
Superfamily Pycnogonoidea Wilson, 1878 [monotypic]
Family Pycnogonidaeᵀ Wilson, 1878
Genus Pycnogonumᵀ Brünnich, 1764
Pycnogonum anovigerum Clark, 1956
Pycnogonum aurilineatum Flynn, 1919
Pycnogonum littorale (Ström, 1762)
Pycnogonum planum Stock, 1954
Pycnogonum pusillum Dohrn, 1881
Pycnogonum rhinoceros (preoccupied)
Pycnogonum stearnsi Ives, 1892
Pycnogonum torresi Clark, 1963
Pycnogonum tuberculatum Clark, 1963