http://www.collembola.org/key/coecbrya.htm - Last updated on 2024.10.31 by Frans Janssens

Checklist of the Collembola: Key to the species of Coecobrya

This key is still under construction. Note that missing figures will be provided as soon as possible. Currently, the key is in the feasibility study phase to find out how to integrate in the checklist in a modular way a key that has been generated with DELTA.

Feng Zhang, Department of Biology, Nanjing University, Nanjing 210093, China
Louis Deharveng, UMR 7205 CNRS, Origine, Structure et Evolution de la Biodiversité, Museum National d'Histoire Naturelle, Paris, France
Jian-Xiu Chen, Department of Biology, Nanjing University, Nanjing 210093, China
Frans Janssens, Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium

Rationale

Key

1(0). Eyes 2 + 2...................................... tetrophthalma Eyes at most 1 + 1.......................................... 2
2(1). Eyes 1 + 1.................................................. 3 Eyes absent................................................. 5
3(2). Fourth abdominal segment with 6 + 6 central macrochaetae.... 4 Fourth abdominal segment with 7 + 7 central macrochaetae...... ............................................. indonesiensis
4(3). First abdominal segment with 4 + 4 central macrochaetae....... ................................................... tukmeas First abdominal segment with 6 + 6 central macrochaetae....... .................................................... boneti
5(2). Mucronal basal spine long reaching at least near apex of apical tooth.............................................. 6 Mucronal basal spine very short, not reaching the apex of apical tooth.......................................... caeca
6(5). Unguis with at most one unpaired inner distal teeth......... 7 Unguis with two unpaired inner distal teeth................ 31
7(6). Manubrium with some dorsal smooth chaetae................... 8 Manubrium without some dorsal smooth chaetae............... 26
8(7). Unguis with unpaired inner distal tooth..................... 9 Unguis without unpaired inner distal tooth................. 25
9(8). Outer tooth on unguiculus at most slightly broader than unguiculus itself........................................ 10 Outer tooth on unguiculus twice as broad as unguiculus itself. ................................................... papuana
10(9). Antennae less than three times as long as the cephalic diagonal................................................. 11 Antennae more than five times as long as the cephalic diagonal............................................... nupa
11(10). Tibiotarsus with rows of "smooth" inner differentiated chaetae, i.e. with ciliations closely appressed to axis.. 12 Tibiotarsus without rows of "smooth" inner differentiated chaetae.................................................. 16
12(11). Fourth abdominal segment with 4 + 4 central macrochaetae... 13 Fourth abdominal segment with more than 4 + 4 central macrochaetae............................................. 14
13(12). Third abdominal segment with 2 + 2 lateral macrochaetae....... ............................................... tenebricosa Third abdominal segment with 3 + 3 lateral macrochaetae....... ............................................. tibiotarsalis
14(12). Third abdominal segment with 1 + 1 central macrochaetae....... .................................................... hoefti Third abdominal segment with 2 + 2 central macrochaetae.... 15
15(14). Second thoracic segment with three medio-median and two medio-lateral macrochaetae.......................... magyari Second thoracic segment with two medio-median and three medio-lateral macrochaetae............................ lanna
16(11). Unguis elongate, with unpaired inner distal tooth basal, at less than 20% from the base of the claw......... akiyoshiana Unguis with unpaired inner distal tooth at more than 25% from the base of the claw..................................... 17
17(16). Second abdominal segment with 4 + 4 central macrochaetae...... ..................................................... kukae Second abdominal segment with at most 3 + 3 central macrochaetae............................................. 18
18(17). Second abdominal segment with 2 + 2 central macrochaetae...... ................................................... similis Second abdominal segment with 3 + 3 central macrochaetae... 19
19(18). First abdominal segment with 4 + 4 central macrochaetae.... 20 First abdominal segment with 5 + 5 central macrochaetae.... 21
20(19). Fourth abdominal segment with 6 or 7 + 6 or 7 central macrochaetae.......................................... aokii Fourth abdominal segment with less than 4 + 4 central macrochaetae............................................ lua
21(19). Unguis with inner paired teeth at less than 25% from the base of the claw.................................... spinidentata Unguis with inner paired teeth at more than 35% from the base of the claw.............................................. 22
22(21). Fourth abdominal segment with 5 + 5 central macrochaetae...... ................................................... dubiosa Fourth abdominal segment with at most 4 + 4 central macrochaetae............................................. 23
23(22). Fourth abdominal segment with 3 + 3 central macrochaetae...... ................................................. oligoseta Fourth abdominal segment with 4 + 4 central macrochaetae... 24
24(23). Second thoracic segment with p4 and p4i macrochaeta... borerae Second thoracic segment with p4 microchaeta and p4i absent.... ................................................ guanophila
25(8). Dental smooth part about 0.7 times as long as mucro. ishikawai Dental smooth part about 1.5 times as long as mucro.. maritima
26(7). Third abdominal segment with 1 + 1 central macrochaetae.... 27 Third abdominal segment with 2 + 2 central macrochaetae.... 29
27(26). Fourth abdominal segment with 7 + 7 central macrochaetae...... .................................................. communis Fourth abdominal segment with less than 6 + 6 central macrochaetae............................................. 28
28(27). Fourth abdominal segment with 3 + 3 central macrochaetae...... .............................................. edenticulata Fourth abdominal segment with 5 + 5 central macrochaetae...... ................................................ tropicalis
29(26). Fourth abdominal segment with 5 + 5 central macrochaetae...... .................................................... huangi Fourth abdominal segment with at least 7 + 7 central macrochaetae............................................. 30
30(29). Fourth abdominal segment with 7 + 7 central macrochaetae. liui Fourth abdominal segment with at least 8 + 8 central macrochaetae..................................... tibetensis
31(6). Tenent hairs clavate............................... submontana Tenent hairs pointed.................................. montana

Endnotes

¹ The species arcuata is not included because of inadequate information.

References