http://www.collembola.org/key/vesialus.htm - Last updated on 2017.10.31 by Frans Janssens
Checklist of the Collembola: Key to the species of Vesicephalus

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.

Enrique Baquero, Department of Zoology and Ecology, University of Navarra, 31080, Pamplona, Navarra, Spain
Richard Snider, Department of Zoology, Michigan University, E. Lansing, Michigan, U.S.A.
Rafael Jordana, Department of Zoology and Ecology, University of Navarra, 31080, Pamplona, Navarra, Spain
Frans Janssens, Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium

Rationale

The rationale for taxa used and not used as well as subtaxonomic classification for some taxa is to be provided.

Key

Note that no distinction between subtaxa and taxa is made in the key.

1(0). Lamella of unguis greatly expanded................. occidentalis
      Lamella of unguis not greatly expanded........................ 2
 
2(1). Dorsal setae of great abdomen pointed................. europaeus
      Dorsal setae of great abdomen truncated....................... 3
 
3(2). Fourth antennal segment as long as sum of first and second
        antennal segments.................................. longisetis
      Fourth antennal segment longer then sum of first and second
        antennal segments........................................... 4
 
4(3). Seta av1' on ventral anal valve long flattened, with some
        fringes............................................. crossleyi
      Seta av1' on ventral anal valve short and pointed.... bellingeri

Differential diagnoses

bellingeri
Dorsal setae of great abdomen truncated. Fourth antennal segment longer then sum of first and second antennal segments. Lamella of unguis not greatly expanded. Seta av1’ on ventral anal valve short and pointed.

crossleyi
Dorsal setae of great abdomen truncated. Fourth antennal segment longer then sum of first and second antennal segments. Lamella of unguis not greatly expanded. Seta av1’ on ventral anal valve long flattened, with some fringes.

europaeus
Dorsal setae of great abdomen pointed. Lamella of unguis not greatly expanded.

longisetis
Dorsal setae of great abdomen truncated. Fourth antennal segment as long as sum of first and second antennal segments. Lamella of unguis not greatly expanded.

occidentalis
Lamella of unguis greatly expanded.


References