http://www.collembola.org/key/ptentaiw.htm - Last updated on 2024.05.31 by Frans Janssens
Checklist of the Collembola: Key to the Ptenothrix denticulata look-alikes from Taiwan and Japan

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.

Hsin-Ju Cheng, Institute of Ecology and Evolutionary Biology, National Taiwan University, Taiwan
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). Cephalic post-ocular patches interconnected by transverse
        pattern (fig.1a)........................................... 2
      Cephalic post-ocular patches not interconnected (fig.1b)..... 4
 

Fig.1.
 
2(1). Large abdomen dorsal median longitudinal pattern quadripartite
        (fig.2b); small abdomen at junction to large abdomen dorsally
        with short median transverse stripe (fig.3b)............ sp.3
      Large abdomen dorsal median longitudinal pattern tripartite
        (fig.2a); small abdomen at junction to large abdomen dorsally
        without short median transverse stripe (fig.3a)............ 3
 

Fig.2.
 

Fig.3.
 
3(2). Midfoot unguiculus with one basal spine (fig.4a); small abdomen
        dorsally with fuzzy median transverse pattern at junction to
        large abdomen (fig.5b).................................. sp.4
      Midfoot unguiculus with two basal serial spines (fig.4b); small
        abdomen dorsally without median transverse pattern at junction
        to large abdomen (fig.5a)........................ denticulata 1
 

Fig.4.
 

Fig.5.
 
4(1). Head vertex with median longitudinal stripe running to neck
        (fig.6b)................................................... 5
      Head vertex without median longitudinal stripe running to neck
        (fig.6a)................................................... 6
 

Fig.6.
 
5(4). Small abdomen with irregular rectangular patch having two white
        spots (fig.7b).......................................... sp.1
      Small abdomen with regular rectangular patch (fig.7a)..... sp.7
 

Fig.7.
 
6(4). Cephalic post-ocular patch connected to eyepatch with extern
        curved longitudinal pattern (fig.8a); small abdomen posterior
        part light (fig.9b)................ denticulata var. catenata
      Cephalic post-ocular patch connected to eyepatch with intern
        curved longitudinal pattern (fig.8b); small abdomen posterior
        part dark (fig.9a)...................................... sp.2

Fig.8.
 

Fig.9.
 


Endnotes

1 P. denticulata Cheng & al (2022) = P. sp.1 ???



References