Checklist of the Collembola: Key to the species of Xenyllodes | ![]() |
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.
Arne Fjellberg,
Mageroveien 168, N-3145 Tjome, Norway
Frans Janssens,
Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium
1(0). Ocelli 2 + 2 (fig.1a)......................................... 2 Ocelli 5 + 5 (fig.1b)......................................... 3 |
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2(1). Dens with only one seta; furca reduced; mucro short...... wapiti Dens with two setae (fig.2); furca not reduced (fig.2); mucro long, curved and blunt (fig.2)......................... psammo |
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3(1). Body colour pale blue.................................. mohuitli Body colour violet-gray over white background................. 4 |
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4(3). Dens longer than mucro; sixth abdominal segment with clavate setae (fig.3b)........................................ armatus Dens subequal in length to mucro; sixth abdominal segment with acuminate setae (fig.3a).................................... 5 |
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5(4). First to third abdominal segment seta a3 absent; first tibiotarsus with 11 setae; third thoracic segment without microsensillum...................................... palaciosi First to third abdominal segment seta a3 present; first tibiotarsus with 12 setae; third thoracic segment with microsensillum.................................. unguidentatus |
armatus
Body colour violet-gray over white background. Dens
longer than mucro. Ocelli 5 + 5 (fig.1b). Sixth abdominal segment with clavate
setae (fig.3b).
mohuitli
Body colour pale blue. Ocelli 5 + 5 (fig.1b).
palaciosi
Body colour violet-gray over white background. Dens
subequal in length to mucro. First tibiotarsus with 11 setae. First to third
abdominal segment seta a3 absent. Ocelli 5 + 5 (fig.1b). Sixth abdominal
segment with acuminate setae (fig.3a). Third thoracic segment without
microsensillum.
psammo
Dens with two setae (fig.2). Furca not reduced (fig.2).
Mucro long, curved and blunt (fig.2). Ocelli 2 + 2 (fig.1a).
unguidentatus
Body colour violet-gray over white background.
Dens subequal in length to mucro. First tibiotarsus with 12 setae. First to
third abdominal segment seta a3 present. Ocelli 5 + 5 (fig.1b). Sixth
abdominal segment with acuminate setae (fig.3a). Third thoracic segment with
microsensillum.
wapiti
Dens with only one seta. Furca reduced. Mucro short.
Ocelli 2 + 2 (fig.1a).