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