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

Checklist of the Collembola: Key to the species of Americanura

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.

José G. Palacios-Vargas, Ecología y Sistemática de Microartrópodos, Departamento de Ecología y Recursos Naturales, Facultad de Ciensas, UNAM, 04510 México D.F.
Jorge Paniagua Nucamendi, Laboratorio de Ecología y Sistemática de Microartrópodos, Departamento de Ecología y Recursos Naturales, Facultad de Ciensas, UNAM, 04510 México D.F.
Frans Janssens, Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium

Rationale

Key

1(0). Dorso-internal tubercles on second thoracic segment with 3 setae..................................................... 2 Dorso-internal tubercles on second thoracic segment with less than 3 setae............................................. 12
2(1). Cephalic seta A absent...................................... 3 Cephalic seta A present (fig.1)............................ 7
Fig.1.
3(2). Thoracic dorso-lateral tubercle with 2 setae........ palaciosi Thoracic dorso-lateral tubercle with 3 setae................ 4
4(3). Cephalic dorso-external tubercle with 2 setae....... medellini Cephalic dorso-external tubercle with 3 setae............... 5
5(4). Ocular tubercle with less than 3 setae...................... 6 Ocular tubercle with three setae (fig.2)........ sardinasensis
Fig.2.
6(5). Ocular tubercle with one seta (fig.3a)............ macgregori Ocular tubercle with two setae (fig.3b)................ iztac
Fig.3.
7(2). Cephalic dorso-external tubercle with 2 setae............... 8 Cephalic dorso-external tubercle with 3 setae............... 9
8(7). Ocular tubercle with three setae; unguis with one tooth....... ................................................. unguimitl Ocular tubercle with two setae; unguis without teeth.......... ............................................... castillorum
9(7). Dorso-external and dorsolateral tubercle on second abdominal segment with 2 setae; eyes 2 + 2 (fig.4)................. 10 Dorso-external and dorsolateral tubercle on second abdominal segment with 3 setae; eyes absent...................... nova
Fig.4.
10(9). Body setae barbulate (fig.5b) (fig.6) (fig.7); on fourth abdominal segment tubercle dorsolateral tubercle with setae. ........................................................ 11 Body setae smooth (fig.5a); on fourth abdominal segment tubercle dorsolateral tubercle without setae.......... prima
Fig.5.
Fig.6.
Fig.7.
11(10). Dorsolateral tubercle and lateral tubercle on fourth abdominal segment fused...................................... imitator Dorsolateral tubercle and lateral tubercle on fourth abdominal segment not fused.................................. mexicana
12(1). Dorso-internal tubercles on second thoracic segment with only one seta................................................. 13 Dorso-internal tubercles on second thoracic segment with two setae.................................................... 20
13(12). Cephalic setae absent...................................... 14 Cephalic setae present..................................... 17
14(13). Ocular tubercle with one seta.............................. 15 Ocular tubercle with two setae............................. 16
15(14). Dorsolateral tubercle on second thoracic segment and third thoracic segment with one seta; lateral tubercle on first and second abdominal segment with 2 setae 100b lateral tubercle on first and second abdominal segment with 2 setae. .............................................. guatemalteca Dorsolateral tubercle on second thoracic segment and third thoracic segment with with 2 setae; lateral tubercle on first and second abdominal segment with 2 setae 100a lateral tubercle on first and second abdominal segment with 2 setae. ............................................... castagnorum
16(14). Dorsolateral tubercle on first and second abdominal segment with 1 seta; dorsolateral tubercle on second thoracic segment and iii with 1 seta.................... setafoliacea Dorsolateral tubercle on first and second abdominal segment with 2 setae; dorsolateral tubercle on second thoracic segment and third thoracic segment with 3 setae..... basseti
17(13). Ocular tubercle with three setae......................... bara Ocular tubercle with two setae............................. 18
18(17). Dorsolateral tubercle on second thoracic segment and third thoracic segment with 2 setae............................ 19 Dorsolateral tubercle on second thoracic segment and third thoracic segment with 3 setae.................. interrogator
19(18). Lateral tubercle on second thoracic segment and third thoracic segment with 2 setae................................. banksi Lateral tubercle on second thoracic segment and third thoracic segment with 3 setae............................ sotanophila
20(12). Ocular tubercle with only one seta; tubercles on third abdominal segment and/or fourth abdominal segment some fused............................................. izabalana Ocular tubercle with two setae; tubercles on third abdominal segment and/or fourth abdominal segment not fused. janssensi

References