http://www.collembola.org/key/heteidae.htm - Last updated on 2017.06.30 by Frans Janssens
Checklist of the Collembola: Key to the genera of Heteromurinae

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.

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). Antennae with 5 segments (fig.1b)............................. 2
      Antennae with 6 segments (fig.1a)............................. 6
 

Fig.1.
 
2(1). Scales hyaline and fusiform (fig.2a); scales absent from
        antennae and furca............................... Mastigoceras
      Scales strongly and apically rounded or truncate (fig.2b);
        scales present on antennae and furca........................ 3
 

Fig.2.
 
3(2). Antennal segment 5 and 4 clearly annulate (fig.3). Verhoeffiella
      Antennal segment 5 annulate only.............................. 4
 

Fig.3.
 
4(3). First abdominal segment with at least 1 + 1 macrochaetae
        (fig.4)..................................................... 5
      First abdominal segment without macrochaetae........ Heteromurus
 

Fig.4.
 
5(4). Dental spines absent............................ Heteromurtrella
      Dental spines present (fig.5)........................ Alloscopus
 

Fig.5.
 
6(1). Fully developed scales fusiform (fig.2a)....... Dicranorchesella
      Fully developed scales rounded or truncate (fig.2b)........... 7
 
7(6). Prelabral setae bifurcate (fig.6).......... Pseudodicranocentrus
      Prelabral setae not bifurcate.................... Dicranocentrus

Fig.6.
 


Differential diagnoses

Alloscopus
Antennae with 5 segments (fig.1b). Antennal segment 5 annulate only. Dental spines present (fig.5). First abdominal segment with at least 1 + 1 macrochaetae (fig.4). Scales strongly and apically rounded or truncate (fig.2b). Scales present on antennae and furca.

Dicranocentrus
Antennae with 6 segments (fig.1a). Fully developed scales rounded or truncate (fig.2b). Prelabral setae not bifurcate.

Dicranorchesella
Antennae with 6 segments (fig.1a). Fully developed scales fusiform (fig.2a).

Heteromurtrella
Antennae with 5 segments (fig.1b). Antennal segment 5 annulate only. Dental spines absent. First abdominal segment with at least 1 + 1 macrochaetae (fig.4). Scales strongly and apically rounded or truncate (fig.2b). Scales present on antennae and furca.

Heteromurus
Antennae with 5 segments (fig.1b). Antennal segment 5 annulate only. First abdominal segment without macrochaetae. Scales strongly and apically rounded or truncate (fig.2b). Scales present on antennae and furca.

Mastigoceras
Antennae with 5 segments (fig.1b). Scales hyaline and fusiform (fig.2a). Scales absent from antennae and furca.

Pseudodicranocentrus
Antennae with 6 segments (fig.1a). Fully developed scales rounded or truncate (fig.2b). Prelabral setae bifurcate (fig.6).

Verhoeffiella
Antennae with 5 segments (fig.1b). Antennal segment 5 and 4 clearly annulate (fig.3). Scales strongly and apically rounded or truncate (fig.2b). Scales present on antennae and furca.


References