http://www.collembola.org/key/oligrini.htm - Last updated on 2017.10.31 by Frans Janssens
Checklist of the Collembola: Key to the genera of Oligaphorurini

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.

Igor J. Kaprus', State Museum of Natural History, Ukrainian National Academy of Sciences, Teatral'na St.18, UA-79008 L'viv, Ukraine
Wanda M. Weiner, Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Slawkowska 17, Pl-31016 Kraków, Poland
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). Fourth antennal segment with apical vesicle; tibiotarsi with
        clavate chaetae in distal whorl............... Chribellphorura
      Fourth antennal segment without apical vesicle; tibiotarsi with
        acuminate chaetae in distal whorl........................... 2
 
2(1). Abdominal terga v and vi accreted dorsally; third antennal
        segment and fourth antennal segment are accreted; anal spines
        absent........................................... Archaphorura
      Abdominal terga v and vi are free; third antennal segment and
        fourth antennal segment are free; anal spines present....... 3
 
3(2). Furcal rudiment in a form of cuticular furrow or small fold... 4
      Furcal rudiment in a form of finely granulated area (fig.1).....
         ............................................. Dimorphaphorura
 

Fig.1.
 
4(3). Row mm with 2 mm3 - 6 setae; row mp with 4-7 setae, the external
        ones are macrochaetae; row ma with 4-6 setae; furcal rudiment
        with two dental setae d on the fold or posteriorly and three
        manubrial rows of setae behind them (fig.2)...... Oligaphorura
      Row mm with 4-6 setae; row mp with 4-5 setae, the external ones
        are macrochaetae; row ma with 4 setae; furcal rudiment with
        three rows of setae behind its posterior edge (fig.3).........
         ................................................ Micraphorura

Fig.2.
 

Fig.3.
 


Differential diagnoses

Archaphorura
Abdominal terga v and vi accreted dorsally. Anal spines absent. Fourth antennal segment without apical vesicle. Third antennal segment and fourth antennal segment are accreted. Tibiotarsi with acuminate chaetae in distal whorl.

Chribellphorura
Fourth antennal segment with apical vesicle. Tibiotarsi with clavate chaetae in distal whorl.

Dimorphaphorura
Abdominal terga v and vi are free. Anal spines present. Fourth antennal segment without apical vesicle. Furcal rudiment in a form of finely granulated area (fig.1). Third antennal segment and fourth antennal segment are free. Tibiotarsi with acuminate chaetae in distal whorl.

Micraphorura
Abdominal terga v and vi are free. Anal spines present. Fourth antennal segment without apical vesicle. Furcal rudiment in a form of cuticular furrow or small fold. Furcal rudiment with three rows of setae behind its posterior edge (fig.3). Row ma with 4 setae. Row mm with 4–6 setae. Row mp with 4–5 setae, the external ones are macrochaetae. Third antennal segment and fourth antennal segment are free. Tibiotarsi with acuminate chaetae in distal whorl.

Oligaphorura
Abdominal terga v and vi are free. Anal spines present. Fourth antennal segment without apical vesicle. Furcal rudiment in a form of cuticular furrow or small fold. Furcal rudiment with two dental setae d on the fold or posteriorly and three manubrial rows of setae behind them (fig.2). Row ma with 4–6 setae. Row mm with 2 mm3 – 6 setae. Row mp with 4–7 setae, the external ones are macrochaetae. Third antennal segment and fourth antennal segment are free. Tibiotarsi with acuminate chaetae in distal whorl.


References