Psyllaphorura, Bagnall, 1948

Shveenkova, Yulia B. & Babenko, Anatoly B., 2021, Two new species of the genus Psyllaphorura (Collembola: Onychiuridae) from the east of European Russia, Zootaxa 4965 (1), pp. 114-128 : 126

Key to the Psyllaphorura species

1 Furcal knobs with 2+2 setae............................................................................. 2

- Furcal knobs with 3+3 setae............................................................................ 3

2 AIIIO with 5 guard setae; PAO vesicles divided; Abd. IV without ventral swellings; 5+5 cephalic pso........ P. bashkirica ( Khanislamova, 1986) ; Russia, southern Urals

- AIIIO with 4 guard setae; PAO vesicles simple; Abd. IV with ventral swellings; 3+3 cephalic pso in МN position........ P. pseudopodis sp. nov.; Russia, European part

3 Head with 3+3 pso .................................................................................... 4

- Head with 2+2 pso.................................................................................... 6

4 Cephalic pso in OR position............................................................................ 5

- Cephalic pso in MN position.................... P. altaica Weiner, Stebaeva & Kaprus’, 2019; Russia, southern Siberia

5 PAO vesicles compound; Abd. III without pso....... P. obesa ( Mills, 1934) ; United States, Iowa, Wisconsin, and Missouri

- PAO vesicles simple or bilobed; lateral pso present on Abd. III............... P. silvestris sp. nov.; Russia, European part

6 Cephalic pso in MN position..................................... P. ryozoyoshii Weiner & Najt, 2000 ; North Korea

- Position of cephalic pso different........................................................................ 7

7 Cephalic pso in BA position............................................................................ 8

- Cephalic pso in OR position............................................................................ 9

8 VT with 8(9)+8(9) setae; 2+2 pso on Abd. IV................... P. olga Babenko & Fjellberg, 2016 ; Russia, North-East

- VT with 7+7 setae; 1+1 pso on Abd. IV..................... P. martynovae ( Stebaeva, 1985) ; Russia, southern Siberia

9 Unguiculus about as long as unguis..................................................................... 10

- Unguiculus shorter than unguis......................................................................... 11

10 Unguis without inner or lateral teeth.............. P. sensillifera ( Martynova, 1981) ; Russia, Far East; northeastern China

- Unguis with clear lateral teeth......................................... P. jirisana Lee & Park, 2021 ; South Korea

11 PAO with 15–18 vesicles; dorsal sensory setae invisible............................... P. uenoi ( Yosii, 1954) ; Japan

- PAO with 20–25 vesicles; dorsal sensory setae distinct...................................................... 12

12 VT with 5+5 setae; unguiculus as long as 0.8–0.9 of unguis............ P. jiangsuensis Yan, Huang & Chen, 2007 ; China

- VT with 7+7 setae; unguiculus as long as 0.5–0.6 of unguis........................... P. okafujii ( Yosii, 1967) ; Japan