Onychiurus
Creators: name: Arbea, Javier
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Onychiuridae
Onychiurus

description: Key to the world species of Onychiurus
1 Th. I without dorsal pseudocelli......................................................................... 2
- Th. I with dorsal pseudocelli.......................................................................... 18
2 Th. I–III with 0,2,2 dorsal pseudocelli.................................................................... 3
- Th. I–III with 0,3,3 dorsal pseudocelli.................................................................... 7
3 Abd. IV with 3+3 dorsal pseudocelli............................................................... O. wilchi
- Abd. IV with more dorsal pseudocelli.................................................................... 4
4 Abd. IV with 4+4 dorsal pseudocelli............................................................ O. gulinensis
- Abd. IV with 5+5 dorsal pseudocelli...................................................................... 5
5 Abd. I without ventral pseudocelli.............................................................. O. saphianus
- Abd I with 1+1 ventral pseudocelli...................................................................... 6
6. Abd. IV without ventral pseudocelli............................................................... O. bhattii
- Abd. IV with 2+2 ventral pseudocelli.......................................................... O. steinmanni
7 Abd. IV with 3+3 dorsal pseudocelli...................................................................... 8
- Abd. IV with more dorsal pseudocelli.................................................................... 15
8 Abd. I–III with 4,4,4 dorsal pseudocelli........................................................ O. gevi sp. nov.
- Abd. I–III with 3,3,3 dorsal pseudocelli (obsiones group sensu Kaprus’, 2008).................................... 9
9 Sense organ of Ant. III with 4 papillae................................................................... 10
- Sense organ of Ant. III with 5 papillae................................................................... 11
10 Formula of parapseudocelli on Abd. sterna as 11100; Ratio length AS /inner edge of claw III 1.00–1,27......... O. vtorovi
- Formula of parapseudocelli on Abd. sterna as 11101; Ratio length AS /inner edge of claw III 0.66–1.00........... O. darii
11 Th. I with 6+6 dorsal chaetae; distal whorl on tibiotarsi with 7 chaetae.......................................... 12
- Th. I with 7+7 dorsal chaetae; distal whorl on tibiotarsi with 9 chaetae.................................... O. jaceki
12 Sense organ of Ant. III with 4 guard chaetae.............................................................. 13
- Sense organ of Ant. III with 5 guard chaetae..................................................... O. sarmaticus
13 VT with 1+1 chaetae at base. Abd. V tergum with a3 as macrochaetae (a3 chaeta longer than a1)............. O. obsiones
- VT without chaetae at base............................................................................ 14
14 Abd. V tergum with a3 as macrochaetae (a3 chaeta longer than a1); empodial appendage half as long as inner edge of claw............................................................................................ O. szeptyckii
- Abd. V tergum with a3 as microchaetae (a3 chaeta shorter than a1); empodial appendage as long as inner edge of claw............................................................................................ O. orienteuropeus
15 Abd. IV with 4+4 dorsal pseudocelli.................................................................... 16
- Abd. IV with 5+5 dorsal pseudocelli.................................................................... 17
16 Th. I–III without ventral pseudocelli.............................................................. O. boldorii
- Th. I.III with 1,1,1 ventral pseudocelli............................................................ O. stillicidii
17 Abd. I–II with 1+1 ventral pseudocelli. Empodial lamella present..................................... O. nathanieli
- Abd. I–II with 2+2 ventral pseudocelli. Empodial lamella absent........................................ O. paoletti
18 Th. I–III with 3,3,5 dorsal pseudocelli............................................................. O. willemi
- Th. I–III with 1(2),3(2),3(2) dorsal pseudocelli............................................................ 19
19 Abd. V with 3+3 dorsal pseudocelli..................................................................... 20
- Abd. V with 4+4 dorsal pseudocelli..................................................................... 35
20 Abd. IV with 3+3 dorsal pseudocelli......................................................... O. polychaetosus
- Abd. IV with more dorsal pseudocelli................................................................... 21
21 Abd. IV with 4+4 dorsal pseudocelli.................................................................... 22
- Abd. IV with 5+5 dorsal pseudocelli.................................................................... 26
22 Head with 1+1 ventral pseudocelli........................................................... O. decemsetosus
- Head with 2+2 ventral pseudocelli...................................................................... 23
23 Abd. IV with 1+1 ventral pseudocelli................................................................... 24
- Abd. IV with 2+2 ventral pseudocelli.................................................................... 25
24 Abd. I with 2+2 ventral pseudocelli................................................... O. subambulans (partim)
- Abd. I without ventral pseudocelli.............................................................. O. antennalis
25 Abd. II with 1+1 ventral pseudocelli............................................................ O. ariegicus
- Abd. II with 2+2 ventral pseudocelli................................. O. ambulans sensu Stach, 1934 & Gisin, 1956
26 Head with 2+2 ventral pseudocelli...................................................................... 27
- Head with 3+3 ventral pseudocelli...................................................................... 32
27 Abd. IV with 1+1 ventral pseudocelli................................................. O. subambulans (partim)
- Abd. IV with 2+2 ventral pseudocelli................................................................... 28
28 Abd. I with 1+1 ventral pseudocelli...................................................................... 29
- Abd. I with 2+2 ventral pseudocelli.................................................. O. circulans from Madeira
29 Abd. II with 1+1 ventral pseudocelli.................................................................... 30
- Abd. II with 2+2 ventral pseudocelli.......................................................... O. furcisetosus
30 Dorsal macrochaetae apically rounded......................................................... O. confugiens
- Dorsal macrochaetae forked at the tip................................................................... 31
31 Formula of parapseudocelli on Abd. sterna as 101003. Males with ventral organ....................... O. rectospinatus
- Formula of parapseudocelli on Abd. sterna as 111003. Males without ventral organ......................... O. reluctus
32 Th. I–III without ventral pseudocelli.......................................................... O. dissimulans
- Th. I–III with 0,1,1 ventral pseudocelli.................................................................. 33
33 Abd. III with 2+2 ventral pseudocelli......................................................... O. subcirculans
- Abd. III with 1+1 ventral pseudocelli................................................................... 34
34 Abd. II with 1+1 ventral pseudocelli.............................................................. O. movilae
- Avd. II with 2+2 ventral pseudocelli............................... O. circulans; O. ambulans sensu Pomorski, 1998
35 Abd. IV with 5+5 dorsal pseudocelli.................................................................... 36
- Abd. IV with 6+6 dorsal pseudocelli............................................................ O. penetrans
36 Head with 2+2 ventral pseudocelli...................................................................... 37
- Head with 3+3 ventral pseudocelli...................................................................... 38
37 Abd. I–IV with 1,2,1,1 ventral pseudocelli...................................................... O. reluctoides
- Abd. I–IV with 2,2,2,1 ventral pseudocelli........................................................... O. ortus
38 Abd. IV with 1+1 ventral pseudocelli........................................................... O. sublegans
- Abd. IV with 2+2 ventral pseudocelli................................................................... 39
39 Abd. III with 1+1 ventral pseudocelli............................................................... O. arans
- Abd. III with 2+2 ventral pseudocelli........................................................... O. insinuans
description: Published as part of Arbea, Javier, 2012, Review of the genus Onychiurus Gervais, 1841 (Collembola: Onychiuridae) with description of a new cave species from Southern Spain, pp. 33-46 in Zootaxa 3564 on pages 43-44, DOI: 10.5281/zenodo.209507