Key to world species of Spatulaphorus (based on Khaustov & Frolov 2018)

1. Genu I with two setae................................................................................. 2

- Genu I with one seta................................................ S. copridis Khaustov, 2007a (Crimea, Iran)

2. Alveoli of setae ps1 and ps2 contiguous; tarsus IV with six setae (pl” present).................................... 3

- Alveoli of setae ps1 and ps2 clearly separated; tarsus IV with five setae (pl” absent)....... S. reductus sp. nov. (Argentina)

3. Seta pl” of tarsus III spiniform.......................................................................... 4

- setae pl” of tarsus III not modified...................................................................... 12

4. Seta tc’ of tarsus III spiniform........................................................................... 5

- Seta tc’ of tarsus III not modified........................................................................ 9

5. Claws on tarsi II and III distinctly thickened basally; tibiotarsus I thick, distinctly wider than genu I................... 6

- Claws on tarsi II and III not thickened basally; tibiotarsus I cylindrical, as wide as genu I............................ 7

6. Setae c1 and c2 subequal in length; setae h1 longer than distance between their bases...................................................................................... S. inbricatipes (Mahunka, 1980) comb. nov. (Argentina)

- Setae c1 distinctly shorter than c2; setae h1 distinctly shorter than distance between their bases S. spinisetus sp. nov. (Brazil)

7. Setae sc2 not modified, setiform......................................................................... 8

- Setae sc2 foliate............................................. S. vladimiri Khaustov, 2005 (Ukraine, Crimea, Iran)

8. Setae d, f, and h1 foliate, setae ps3 slightly longer than ps1-2 ............ S. venustus Khaustov and Trach, 2012 (Ukraine)

- Setae d, f, and h1 not foliate, setae ps3 at least twice longer than ps1-2 ... S. altaicus Khaustov and Trach, 2018 (Russia: Altai)

9. Claws on tarsi II and III distinctly thickened basally; tibiotarsus I thick, distinctly wider than genu I.................. 10

- Claws on tarsi II and III not thickened basally; tibiotarsus I cylindrical, as wide as genu I.............................................................................. S. gorganica Rahiminejad and Hajiqanbar, 2011 (Iran, Crimea)

10. Alveoli of setae e and f as well as h1 and h2 clearly separated; setae ps1-2 smooth; seta pl” of tarsus IV about twice longer than maximum width of tarsus IV........................................................................... 11

- Alveoli of setae e and f as well as h1 and h2 contiguous; setae ps1-2 barbed; seta pl” of tarsus IV about as long as maximum width of tarsus IV................................................. S. mexicanus Trejo-Palacios, 2023 (Mexico)

11. Dorsal idiosomal setae short; setae c1, f, and h1 shorter than distances between their bases... S. brevisetosus sp. nov. (USA)

- Dorsal idiosomal setae long; setae c1, f, and h1 longer than distances between their bases.... S. longisetosus sp. nov. (USA)

12. Seta tc’ of tarsus III spiniform.......................................................................... 13

- Seta tc’ of tarsus III not modified....................................................................... 14

13. Tibiotarsus I with a small, almost straight claw, and no counterpart........ S. foliatus Dastych and Rack, 1993 (Botswana)

- Tibiotarsus I with large, hook-like claw and a distinct counterpart opposite to the claw base............................................................................................ S. langi Dastych and Rack, 1993 (Vietnam)

14. Seta tc’ of tarsus II spiniform and curved................................................................. 15

- Seta tc’ of tarsus II not modified........................................................................ 17

15. Setae e situated distinctly posteriad setae f ................................................................ 16

- Setae e situated slightly anteriad setae f ..................................... S. venezuelaensis sp. nov. (Venezuela)

16. Idiosomal tergites with big puncta (Fig. 7A).................... S. porosus Khaustov and Frolov, 2021 (French Guiana)

- Idiosomal tergites only with tiny puncta (Fig. 1A)................ S. dignus Khaustov and Frolov, 2021 (French Guiana)

17. Distances between setae h1-h1 and h1-h2 subequal......................................................... 18

- Distances between setae h1-h1 much greater than h1-h2 ..................................................... 20

18. Setae ps3 subequal to or shorter than ps1-2 ............................................................... 19

- Setae ps3 distinctly longer than ps1-2 ....................... S. luriei Dastych, Rack and Camerik, 1997 (South Africa)

19. Setae (pv) on tarsus III foliate, setae ps1-2 distinctly barbed..... S. enoplotruporum Khaustov and Frolov, 2018 (Thailand)

- Setae (pv) on tarsus III not foliate, setae ps1-2 smooth................. S. camerikae Dastych and Rack, 1993 (Botswana)

20. Apodemes 4 long, extending beyond setae 3b; apodemes 3 weakly developed.................................... 21

- Apodemes 4 vestigial; apodemes 3 well developed between bases of setae 3a and trochanter III.......................................................................................... S. geotruporum Khaustov, 2005 (Ukraine)

21. Tibiotarsus I thickened, almost ovoid in shape and distinctly wider than genu I................................... 22

- Tibiotarsus I cylindrical, subequal in width with genu I........................ S. geotrupi (Mahunka, 1970) (Hungary)

22. Apodemes 5 short, weakly sclerotized................................................................... 23

- Apodemes 5 long, thick and well sclerotized, extending beyond bases of trochanter IV................................................................................................ S. madagascariensis sp. nov. (Madagascar)

23. Setae ps3 subequal with ps1-2 .......................................................................... 24

- Setae ps3 more than twice longer than ps1-2 ........................ S. gymnopleuri Sobhi and Hajiqanbar, 2017 (Iran)

24. Posterior margin of posterior sternal plate deeply incised; setae ps1-2 weakly barbed.......... S. incisus sp. nov. (Brazil)

- Posterior margin of posterior sternal plate only slightly concave; setae ps1-2 smooth... S. braziliensis Khaustov and Frolov, 2017 (Brazil, French Guiana)