Pentamerismus McGregor 1949

Key to subgenera and species of Pentamerismus of the world 1. Dorsal opisthosomal setae f 2 absent. Subgenus Pentamerismus (Oligomerismus) Mitrofanov, 1973 ................... 2 - Dorsal opisthosomal setae f 2 present. Subgenus Pentamerismus (Pentamerismus) McGregor, 1949 .................. 11 2. Dorsal opisthosoma with dorsolateral setae c 2 and d 2 setiform.................................................. 3 - Dorsal opisthosoma with dorsolateral setae c 2 and d 2 lanceolate to spatulate....................................... 5 3. Dorsal propodosoma with small medial notch forming a pair of lobes anterior to setae v 2 ......... P. (O.) taxi (Haller, 1877) - Dorsal propodosoma with anterior margin without pair of lobes................................................ 4 4. Dorsal idiosoma entirely striate, dorsolateral (c 3, d 3, e 2, e 3, f 3, h 2 and h 1) setae long................................................................................................. P. (O.) tauricus Livshitz & Mitrofanov, 1970 - Dorsal idiosoma reticulate, dorsolateral setae (c 3, d 3, e 2, e 3, f 3, h 2 and h 1) short.................................................................................................. P. (O.) coronatus (Canestrini & Fanzago, 1876) 5. Dorsal opisthosomal setae c 1, d 1, e 1 minute, setiform......................................................... 6 - Dorsal opisthosomal setae c 1, d 1, e 1 lanceolate to spatulate.................................................... 10 6. Either or both dorsal propodosoma and opisthosoma with reticulations.......................................... 7 - Dorsal opisthosoma with lineate cuticle................................................................... 8 7. Dorsal idiosoma cuticle completely reticulate............................ P. (O.) ossianensis Thewke & Enns, 1971 - Dorsal propodosoma and dorsal opisthosoma each with only a small medial region of reticulation.............................................................................................. P. (O.) judiciarius De Leon, 1961 8. Genu I and II with two setae......................................... P. (O.) shandongensis (Wang & Ma, 1993) - Genu I and II with three setae........................................................................... 9 9. Palp tibia with one seta................................................... P. (O.) canadensis McGregor, 1949 - Palp tibia with two setae.................................................. P. (O.) oregonensis McGregor, 1949 10. Dorsal propodosoma medially reticulated.......................................... P. (O.) foetidae (Meyer, 1979) - Dorsal propodosoma medially striated or rugose...................................... P. (O.) retusus Meyer, 1979 11. Dorsal opisthosomal setae setiform...................................................................... 14 - Dorsal opisthosomal setae broadly lanceolate to spatulate.................................................... 12 12. Genital and pseudanal setae broadly lanceolate and heavily barbed............... P. (P.) sititoris Beard & Seeman, 2014 - Gential and pseudanal setae fine, setiform and weakly barbed................................................. 13 13. Palp tibia with two setae, dorsal cuticle weakly reticulated........................ P. (P.) wardo Seeman & Beard, 2014 - Palp tibia with one seta, dorsal cuticle strongly reticulated................ P. (P.) hicklingorum Seeman & Beard, 2014 14. Femora I–II with three setae............................................ P. (P.) kunmingensis Ma & Yaun, 1980 - Femora I–II with four setae............................................................................ 15 15. Anterior margin of dorsal propodosoma shallowly notched................................................... 16 - Anterior margin of dorsal propodosoma deeply notched..................................................... 17 16. Palp femur with one seta; dorsal propodosomal setae slender.................... P. (P.) arbutusae Baker & Tuttle, 1987 - Palp femur without seta; propodosomal setae spatulate or leaf like............... P. (P.) abnormis Baker & Tuttle, 1987 17. Dorsal propodosomal setae setiform................................. P. (P.) ueckermanni Khanjani & Gotoh, 2008 - Propodosomal setae spatulate or leaf like................................................................. 18 18. Dorsal propodosoma medially smooth................................ P. (P.) behsharicus Khanjani & Gotoh, 2008 - Dorsal propodosoma medially rugose lineate, reticulate striated............................................... 19 19. Dorsal propodosoma completely reticulate-rugose.......................................................... 20 - Dorsal propodosoma irregular lineate.................................................................... 21 20. Dorsal opisthosomal setae c 2 setiform............................................ P. (P.) erythreus (Ewing, 1917) - Dorsal opisthosomal setae c 2 lanceolate................................ P. (P.) bahaensis Alatawi & Kamran, 2015 21. Dorsal opisthosomal seta c 2 setiform................................................. P. (P.) juniperi Reck, 1951 - Dorsal opisthosomal seta c 2 lanceolate................................ P. (P.) foliisetis Livshitz & Mitrofanov, 1967