Key to the recorded Iranian species of Pseudachorutes

The number of Iranian species of the genus Pseudachorutes is probably underestimated (Shayanmehr et al., 2020).

1 Tht. I with 4+4 setae, lateral teeth on claws present...................... P. dubius Krausbauer, 1896 (West Palearctic)

- Tht. I with 3+3 setae, lateral teeth on claws absent (Figs 1, 7, 12, 17)............................................ 2

2 Abdt. IV with 2+ 2 m -chaetae, PAO with 15-19 vesicles (Figs 1, 6)........................ P. hyrcanicus sp. nov. (Iran)

- Abdt. IV with 0-1+ 0-1 m -chaetae, PAO with fewer number of vesicles (Figs 12, 16)................................ 3

3 Tht. II without a 2 chaetae, Tibiotarsi of legs I, II, III with 18, 18, 17 chaetae, respectively, VT with 3+3 chaetae (Figs 13, 17, 19)....................................................................... P. kurdistanicus sp. nov. (Iran)

- Tht. II with a 2 chaetae present, Tibiotarsi of legs I, II, III with 19, 19, 18 chaetae, respectively, VT with 4+4 chaetae...... 4

4 Tht. II with 5+5 chaetae in a -row (a 5 present), Abdt. I-III with m 4 chaetae present (as on Fig. 1), tibiotarsi with one clavate tenent hair................................................... P. corticicolus (Schäffer, 1896) (West Palearctic)

- Thoracic tergum II with 4+4 chaetae in a -row (a 5 absent), Abdt. I-III without m 4 chaetae (as on Figs 12, 17), tibiotarsi without such hair............................................................................................ 5

5 Four prelabral chaetae present (as on Fig. 5a), mandible with four teeth (two inner teeth are equal approximately), Ant. IV ventrally in adult specimens with 15-18 short and truncate chaetae (as on Fig. 4).................................................................................................. P. subcrassus Tullberg, 1871 (West Palearctic)

- Two prelabral chaetae present, mandible with four teeth (medial tooth very small, subapical tooth bigger than medial ones), Ant. IV ventrally in adult specimens without such chaetae...................... P. parvulus Börner, 1901 (West Palearctic)