Heteraphorura

Kaprus’, Igor, Shayanmehr, Masoumeh, Kahrarian, Morteza & Lafooraki, Elham Yoosefi, 2017, Three new species of Onychiuridae Lubbock, 1871 (Collembola, Poduromorpha) from Iran, Zootaxa 4291 (2), pp. 335-346 : 338-339

Key to the Palearctic species of Heteraphorura

1. Vesicles in PAO simple, bi- or multilobed, located perpendicularly or obliquely to the long axis of the organ (euro-asiatic group after Arbea 2014)................................................................................2

- All vesicles in PAO granulated ( Fig. 2 ) (oriental group after Arbea 2014).........................................5

2. Abd. terga I–III with 2+2 axial chaetae (m1 absent), claw without lateral teeth.....................................3

- Abd. terga I–III with 3+3 axial chaetae (m1 present) ( Fig. 3 ), claw with lateral teeth ( Fig. 4 )..........................4

3. Pso formula dorsally: 20/011/11022, VT with 13–19 + 13–19 chaetae, MVO absent......................................................................................... H. orientalis ( Martynova, 1976) ( Russia: Eastern Siberia)

- Pso formula dorsally: 30/011/11023, VT with 7–8 + 7–8 chaetae, MVO present on Abd. sternum IV, consists of 22–32 thick chaetae................................................... H. steineri ( Arbea, 2014) ( Italy: Apennine Mountains)

4. Empodial appendage length equals 2/3 of inner edge of claw, pso formula dorsally: 3(2)0/011/11022(3), MVO present on Abd. sternum IV, consists of 20–40 thick chaetae.................................................................... H. variotuberculata ( Stach, 1934) (Austria, Bosnia, Herzegovina, Hungary, Italia, Poland, Slovakia, Slovenia and Ukraine)

- Empodial appendage very short, rudimental, 1/4 of inner edge of claw (do not extend to the denticle on claw), pso formula dorsally: 20/011/11023(2, 4), MVO present on Abd. sternum IV, consists of 20–35 thick chaetae.................................................................. H. carpatica ( Stach, 1954) (Eastern Carpathians: Poland, Slovakia, Ukraine)

5. Basis of antenna as a rule with 2 pso......................................................................6

- Basis of antenna with 3 pso..............................................................................8

6. Abd. terga I–III with 2+2 axial chaetae, pso formula dorsally: 20/011/11022(3), MVO absent............................................................................... H. pseudoseolagensis ( Martynova, 1981) ( Russia: Far East)

- Abd. terga I–III with 3+3 axial chaetae.....................................................................7

7. Pso formula dorsally: 2(3)0/011/11023(4), Abd. tergum VI with 2 median chaetae (a0 and p0), MVO present on Abd. sternum IV, consisting of numerous short chaetae, dispersed at random....................... * H. japonica ( Yosii, 1967) ( Japan)

- Pso formula dorsally: 20/011/11023, Abd. tergum VI with 3 median chaetae (a0, m0 and p0) ( Fig. 1 ), MVO present on Abd. sternum IV, consisting of 25–40 thick chaetae, located closely together in integumentary pocket ( Figs 6, 7& 8 )............................................................................................. H. iranica sp. nov. ( Iran)

8. AIIIO with 4 guard chaetae, pso formula dorsally: 3?/011/11113...........** H. conjungens (Börner, 1909) ( Japan, China)

-. AIIIO with 5 guard chaetae..............................................................................9

9. Abd tergum VI with strong lateral conical granules forming integumentary papillae, Abd. terga I–III with 2+2 axial chaetae, pso formula dorsally: 30/011/11023........................ H. seolagensis ( Lee, 1974) ( South Korea , Russia: Far East)

- Granulation of Abd tergum VI without lateral integumentary papillae...........................................10

10. Pso formula dorsally 30/011/11023, submedian chaetae m1 on Abd tergum V are short, not reached to posterior margin of tergum ( Fig. 1 ), MVO present on Abd. sternum IV, consists of 2+2 club-shaped, ciliated chetae, located on papillae..................................................................................... H. imadatei ( Yosii, 1956) ( Japan)

- Pso formula dorsally 30/011/1101(0)2(1), submedian chaetae m1 on Abd. tergum V are long, distinctly reached to posterior margin of tergum, MVO unknown................................. H. longisetosa ( Lee & Park, 1986) ( South Korea)

Figures

FIGURES 1 – 8. Heteraphorura iranica sp. nov.: 1, habitus and dorsal chaetotaxy; 2, PAO and anterior cephalic pso; 3, AIIIO; 4, tibiotarsal chaetotaxy and claw of leg III; 5, chaetotaxy of anal valves; 6, MVO and furcal area (subadult male); 7, MVO and furcal area (adult male); 8, chaetotaxy of Abd. sterna III – VI.