Taxa included

Petrunkevitch, A. (1955a). Arachnida. In: Moore, R.C. (ed.) Treatise on invertebrate paleontology. P, Arthropoda University of Kansas Press, Lawrence 2: 42–162. ZooBank: F42C9AFA-4F47-4D06-BD19-40CBA0BFD5FC

Taxon
Dichela berendtii Menge, 1854 (Pseudoscorpiones: Cheliferidae) n/a, fig. 49(4), Oligochelifer berendtii (Menge)
Phrynus fuscimanus C.L. Koch, 1847 (Amblypygi: Phrynidae) n/a, fig. 92, Tarantula fuscimana (C.L. Koch)
Chelignathus kochii Menge, 1854 (Pseudoscorpiones: Chthoniidae) n/a, fig. 49(2), Heterolophus kochii (Menge)
Pseudogarypus hemprichii (C.L. Koch and Berendt, 1854) (Pseudoscorpiones: Pseudogarypidae) n/a, fig. 49(3), Pseudogarypus hemprichii (C.L. Koch and Berendt)
Obisium rathkii C.L. Koch and Berendt, 1854 (Pseudoscorpiones: Cheliferidae) n/a, fig. 49(1), Neobisium rathkii (C.L. Koch and Berendt)
Oligochernes bachofeni Beier, 1937 (Pseudoscorpiones: Chernetidae) n/a, fig. 50(2), Oligochernes bachofeni
Cheiridium hartmanni (Menge, 1854) (Pseudoscorpiones: Cheiridiidae) n/a, fig. 50(1), Cheiridium hartmanni (Menge)
Cryptocellus foedus Westwood, 1874 (Ricinulei: Ricinoididae) n/a, fig. 113, Cryptocellus foedus
Eremobates pallipes (Say, 1823) (Solifugae: Eremobatidae) n/a, figs 112(2a-d), Eremobates pallipes (Say)
Pseudocellus dorotheae (Gertsch and Mulaik, 1939) (Ricinulei: Ricinoididae) n/a, fig. 114(1), Cryptocellus dorotheae
Hubbardia pentapeltis Cook, 1899 (Schizomida: Hubbardiidae) n/a, fig. 86(2), Trithyreus pentapeltis (Cook)
Galeodes arabs C.L. Koch, 1842 (Solifugae: Galeodidae) n/a, fig. 111, Galeodes arabs
Zeria venator (Pocock, 1897) (Solifugae: Solpugidae) n/a, fig. 112(1), Solpuga venator
Labochirus proboscideus (Butler, 1872) (Uropygi: Thelyphonidae) n/a, fig. 84(1), Labochirus proboscideus (Butler)
Mastigoproctus giganteus (Lucas, 1835) (Uropygi: Thelyphonidae) n/a, figs 33(2), 84(2), Mastigoproctus giganteus (Lucas)
Prokoenenia wheeleri (Rucker, 1901) (Palpigradi: Prokoeneniidae) n/a, figs 82(2a–f), Prokoenenia wheeleri (Rucker)
Pseudoscorpiones de Geer, 1778 79–80, (as Pseudoscorpionida), Pseudoscorpiones de Geer
Pseudoscorpiones de Geer, 1778 80, (as Chthoniina), Chthoniinea
Chthoniidae Daday, 1889 (Pseudoscorpiones) 80, Chthoniidae Daday
Chthonius C.L. Koch, 1843 (Pseudoscorpiones: Chthoniidae) 80, Chthonius
Pseudoscorpiones de Geer, 1778 81, (as Neobisiina), Neobisiinea
Heterolophus Tömösváry, 1884 (Pseudoscorpiones: Chthoniidae) 81, Heterolophus
Neobisiidae Chamberlin, 1930 (Pseudoscorpiones) 81, Neobisiidae
Neobisium Chamberlin, 1930 (Pseudoscorpiones: Neobisiidae) 81, Neobisium
Olpiidae Banks, 1895 (Pseudoscorpiones) 81, Olpiidae Banks
Chthoniidae Daday, 1889 (Pseudoscorpiones) 81, Dithidae Chamberlin
Cheliferidae Risso, 1827 (Pseudoscorpiones) 82, Cheliferidae
Pseudoscorpiones de Geer, 1778 82, (as Cheliferina), Cheliferinea
Pseudogarypidae Chamberlin, 1923 (Pseudoscorpiones) 82, Pseudogarypidae Chamberlin
Chernetidae Menge, 1855 (Pseudoscorpiones) 82, Chernetidae
Garypidae Simon, 1879 (Pseudoscorpiones) 82, Garypidae Simon
Cheiridiidae Hansen, 1894 (Pseudoscorpiones) 82, Cheiridiidae Hansen
Palpigradi Thorell, 1888 116–117, (as Palpigradida), Palpigradi
Eukoeneniidae Petrunkevitch, 1955 (Palpigradi) 117–118, Eukoeneniidae
Eukoenenia Börner, 1901 (Palpigradi: Eukoeneniidae) 118, Eukoenenia Börner
Eukoenenia mirabilis (Grassi and Calandruccio, 1885) (Palpigradi: Eukoeneniidae) 118, figs 82(1a–b), Eukoenenia mirabilis (Grassi and Calandruccio)
Uropygi Thorell, 1883 119–120, Thelyphonida
Thelyphonus Latreille, 1802 (Uropygi: Thelyphonidae) 120, Thelyphonus
Prothelyphonus Frič, 1904 (Uropygi: Incertae sedis) 120, Prothelyphonus
Thelyphonidae Blanchard, 1852 (Uropygi) 120, Thelyphonidae
Geralinura Scudder, 1884 (Uropygi: Incertae sedis) 120, Geralinura
Prothelyphonus bohemicus (Kušta, 1884) (Uropygi: Incertae sedis) 120, figs 77(3), 84(4), Prothelyphonus bohemicus (Kušta)
Geralinura britannica Pocock, 1911 (Uropygi: Incertae sedis) 120, (misidentification, in part; see Proschizomus petrunkevitchi Dunlop and Horrocks), Prothelyphonus britannicus (Pocock)
Geralinura similis Petrunkevitch, 1913 (Uropygi: Incertae sedis) 120, fig. 85(3a–b), Geralinura similis
Proschizomus petrunkevitchi Dunlop and Horrocks, 1996 (Uropygi: Incertae sedis) 120, fig. 85(5) (misidentification, in part), Prothelyphonus britannicus (Pocock)
Geralinura carbonaria Scudder, 1884 (Uropygi: Incertae sedis) 120, figs 85(1a–b), Geralinura carbonaria
Geralinura gigantea Petrunkevitch, 1913 (Uropygi: Incertae sedis) 120, fig. 85(2a–b), Prothelyphonus giganteus (Petrunkevitch)
Schizomida Petrunkevitch, 1945 122–123, Schizomida
Calcitronidae Petrunkevitch, 1945 (Schizomida) 123, Calcitronidae
Calcoschizomus Pierce, 1951 (Schizomida: Hubbardiidae) 123, Calcoschizomus
Calcoschizomus latisternum Pierce, 1951 (Schizomida: Hubbardiidae) 123, fig. 90(2), Calcoschizomus latisternum
Schizomus crassicaudatus (O. Pickard-Cambridge, 1872) (Schizomida: Hubbardiidae) 123, fig. 86(1), Schizomus crassicaudatus (O. Pickard-Cambridge)
Schizomus Cook, 1899 (Schizomida: Hubbardiidae) 123, Schizomus
Ovozomus peradeniyensis (Gravely, 1911) (Schizomida: Hubbardiidae) 123, fig. 87, Schizomus peradeniyensis Gravely
Schizomoidae Hansen and Sörensen, 1905 (Schizomida) 123, Schizomidae
Calcitro Petrunkevitch, 1945 (Schizomida: Calcitronidae) 124, Calcitro
Calcitro fisheri Petrunkevitch, 1945 (Schizomida: Calcitronidae) 124, figs 88–89, Calcitro fisheri
Onychothelyphonus Pierce, 1950 (Schizomida: Hubbardiidae) 124, Onychothelyphonus
Onychothelyphonus bonneri Pierce, 1950 (Schizomida: Hubbardiidae) 124, figs 90(1a–b), Onychothelyphonus bonneri
Amblypygi Thorell, 1883 126, Phrynichida
Graeophonus Scudder, 1890 (Amblypygi: Incertae sedis) 126, Graeophonus Scudder
Graeophonus anglicus Pocock, 1911 (Amblypygi: Incertae sedis) 126, figs. 93(2a–c), Graeophonus anglicus Pocock
Phrynichidae Simon, 1892 (Amblypygi) 126, Phrynichidae Simon
Phrynichus Karsch, 1879 (Amblypygi: Phrynichidae) 126, Phrynichus Karsch
Phrynichus reniformis (Linnaeus, 1758) (Amblypygi: Phrynichidae) 126, fig. 36, Phrynichus reniformis (Linnaeus)
Graeophonus scudderi Pocock, 1911 (Amblypygi: Incertae sedis) 126, figs. 93 (1a–c), Graeophonus carbonarius (Scudder)
Graeophonus carbonarius (Scudder, 1876) (Amblypygi: Incertae sedis) 126, figs. 93 (1a–c), Graeophonus carbonarius (Scudder)
Protophrynus Petrunkevitch, 1913 (Amblypygi: Incertae sedis) 128, [junior homonym of Protophrynus Pomel, 1853 (Amphibia)], Protophrynus
Sorellophrynus carbonarius (Petrunkevitch, 1913) (Amblypygi: Incertae sedis) 128, figs. 93 (3a–b), Protophrynus carbonarius Petrunkevitch
Thelyphrynus Petrunkevitch, 1913 (Amblypygi: Incertae sedis) 128, Thelyphrynus Petrunkevitch
Thelyphrynus elongatus Petrunkevitch, 1913 (Amblypygi: Incertae sedis) 128, figs. 94 (1a–b), Thelyphrynus elongatus Petrunkevitch
Solifugae Sundevall, 1833 154, (as Solpugida), Solifugae
Galeodidae Sundevall, 1833 (Solifugae) 155, Galeodidae
Protosolpuga Petrunkevitch, 1913 (Solifugae: Protosolpugidae) 155, Protosolpuga
Protosolpuga carbonaria Petrunkevitch, 1913 (Solifugae: Protosolpugidae) 155, fig. 112(3), Protosolpuga carbonaria
Ricinulei Thorell, 1876 156–159, (as Ricinuleida), Ricinulei
Curculioididae Cockerell, 1916 (Ricinulei) 159, Curculioididae
Curculioides Buckland, 1837 (Ricinulei: Curculioididae) 159–160, Curculioides
Curculioides ansticii Buckland, 1837 (Ricinulei: Curculioididae) 159, figs 115(4a–b), Curculioides ansticii
Curculioides eltringhami Petrunkevitch, 1949 (Ricinulei: Curculioididae) 159–160, figs 115(3a–b), Curculioides eltringhami
Poliocheridae Scudder, 1884 (Ricinulei) 159, Poliocheridae
Poliochera Scudder, 1884 (Ricinulei: Poliocheridae) 159, Poliochera
Poliochera glabra Petrunkevitch, 1913 (Ricinulei: Poliocheridae) 159, fig. 115(5), Poliochera glabra
Poliochera punctulata Scudder, 1884 (Ricinulei: Poliocheridae) 159, figs 115(1a–b), Poliochera punctulata
Terpsicroton alticeps (Pocock, 1911) (Ricinulei: Poliocheridae) 159, fig. 115(6), Poliochera alticeps
Ricinoididae Ewing, 1929 (Ricinulei) 160, Ricinoididae
Ricinoides karschii (Hansen and Sørensen, 1904) (Ricinulei: Ricinoididae) 160, fig. 114(2), Ricinoides karschii (Hansen and Sørensen)
Amarixys gracilis (Petrunkevitch, 1945) (Ricinulei: Curculioididae) 160, figs 116(2a–b), Curculioides gracilis
Amarixys sulcata (Melander, 1903) (Ricinulei: Curculioididae) 160, figs 116(3a–b), Curculioides sulcatus (Melander)
Curculioides granulatus Petrunkevitch, 1949 (Ricinulei: Curculioididae) 160, figs 115(2a–b), Curculioides granulatus
Curculioides scaber (Scudder, 1890) (Ricinulei: Curculioididae) 160, figs 116(1a–b), Curculioides scaber (Scudder)
Ricinoides Ewing, 1929 (Ricinulei: Ricinoididae) 160, Ricinoides