http://www.collembola.org/key/cyphidae.htm - Last updated on 2020.02.29 by Frans Janssens
Checklist of the Collembola: Key to the genera of Cyphoderini

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.

Peter F. Bellinger (), Department of Biology, California State University, Northridge, CA 91330, USA
Kenneth A. Christiansen, Department of Biology, Grinnell College, PO Box V3, Grinnell, IA 50112-0806, USA
Penelope Greenslade, Biosecurity Australia, Barton, ACT 2601, Australia
Douglas Zeppelini, Laboratório de Sistemática de Collembola e Conservaçao. Depto. Biologia, Centro de Ciencias Biolgicas e Sociais Aplicadas. Univ. Estadual da Paraíba, Joao Pessoa, PB, Brazil
Frans Janssens, Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium

Rationale

Check the rationale for taxa used and not used as well as subtaxonomic classification for some taxa.

Key

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

    
1(0).   Claw more or less globular (fig.1)............... Cyphoderodes
        Claw never globular......................................... 2

Fig.1.
   
2(1).   Head less than 2 times as long as distance from dorsum to tip
          of buccal cone (fig.2b)................................... 3
        Head more than 2 times as long as distance from dorsum to tip
          of buccal cone (fig.2a)......................... Calobatinus

Fig.2.
   
3(2).   Males with lateral projection on second antennal segment
          (fig.3)...................................... Paracyphoderus
        Males without lateral projection on second antennal segment. 4

Fig.3.
   
4(3).   Dens dorsally with 2 rows of large feathered setae (fig.4a)...
           ................................................... Borecus 3
        Dens dorsally with scales and normal setae (fig.4b)......... 5

Fig.4.
   
5(4).   Mandibles present........................................... 6
        Mandibles vestigial.............................. Cyphoderinus
 

6(5).   Unguis apical teeth at least 5 (fig.5)............ Delamarerus
        Unguis apical teeth at most 3............................... 7

Fig.5.
   
7(6).   Unguis with a filamentous projection on one or two inner teeth
          (fig.6)...................................... Megacyphoderus 1
        Unguis without filamentous projection on inner teeth........ 8

Fig.6.
   
8(7).   Mouth cone projecting downward (fig.7c&d)................... 9
        Mouth cone projecting forward (fig.7a&b)................... 10

Fig.7.
   
9(8).   Mucro long, with two or more dorsally projecting teeth
          (fig.8a)...................................... Cephalophilus 2
        Mucro small and toothed (fig.8b), vestigial or absent.........
           .......................................... Pseudocyphoderus

Fig.8.
   
10(8).  Furca with setae between large scales on dorsum of dens
          (fig.9b)................................................. 11
        Furca without setae between large scales on dorsum of dens
          (fig.9a)......................................... Serroderus

Fig.9.
   
11(10). Mucro gutter-like with two dorsal lamellae at least one
          toothed (fig.10)................................. Troglobius
        Mucro with a single dorsal lamella with or without dorsal
          teeth............................................ Cyphoderus

Fig.10.
  

Endnotes

1 Cyphoderodes punjabicus Yosii & Ashraf, 1964 and C. singaporicus Murphy & Yoshii, 1992 may run here.

2 Pseudocyphoderus machadoi Delamare, 1958 will also run here.

3 Borecus Folsom 1923 has been sunk to synonymy with Cyphoderus by Mills, 1934.

Differential diagnoses

Borecus 3
Claw never globular. Dens dorsally with 2 rows of large feathered setae (fig.4a). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment.

Calobatinus
Claw never globular. Head more than 2 times as long as distance from dorsum to tip of buccal cone (fig.2a).

Cephalophilus 2
Claw never globular. Dens dorsally with scales and normal setae (fig.4b). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment. Mandibles present. Mouth cone projecting downward (fig.7c&d). Mucro long, with two or more dorsally projecting teeth (fig.8a). Unguis without filamentous projection on inner teeth. Unguis apical teeth at most 3.

Cyphoderinus
Claw never globular. Dens dorsally with scales and normal setae (fig.4b). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment. Mandibles vestigial.

Cyphoderodes
Claw more or less globular (fig.1).

Cyphoderus
Claw never globular. Dens dorsally with scales and normal setae (fig.4b). Furca with setae between large scales on dorsum of dens (fig.9b). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment. Mandibles present. Mouth cone projecting forward (fig.7a&b). Mucro with a single dorsal lamella with or without dorsal teeth. Unguis without filamentous projection on inner teeth. Unguis apical teeth at most 3.

Delamarerus
Claw never globular. Dens dorsally with scales and normal setae (fig.4b). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment. Mandibles present. Unguis apical teeth at least 5 (fig.5).

Megacyphoderus 1
Claw never globular. Dens dorsally with scales and normal setae (fig.4b). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment. Mandibles present. Unguis with a filamentous projection on one or two inner teeth (fig.6). Unguis apical teeth at most 3.

Paracyphoderus
Claw never globular. Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males with lateral projection on second antennal segment (fig.3).

Pseudocyphoderus
Claw never globular. Dens dorsally with scales and normal setae (fig.4b). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment. Mandibles present. Mouth cone projecting downward (fig.7c&d). Mucro small and toothed (fig.8b), vestigial or absent. Unguis without filamentous projection on inner teeth. Unguis apical teeth at most 3.

Serroderus
Claw never globular. Dens dorsally with scales and normal setae (fig.4b). Furca without setae between large scales on dorsum of dens (fig.9a). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment. Mandibles present. Mouth cone projecting forward (fig.7a&b). Unguis without filamentous projection on inner teeth. Unguis apical teeth at most 3.

Troglobius
Claw never globular. Dens dorsally with scales and normal setae (fig.4b). Furca with setae between large scales on dorsum of dens (fig.9b). Head less than 2 times as long as distance from dorsum to tip of buccal cone (fig.2b). Males without lateral projection on second antennal segment. Mandibles present. Mouth cone projecting forward (fig.7a&b). Mucro gutter-like with two dorsal lamellae at least one toothed (fig.10). Unguis without filamentous projection on inner teeth. Unguis apical teeth at most 3.

References