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

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.

José G. Palacios-Vargas, Laboratorio Ecologia y Sistemática de Microartrópodos, Departamento Biologia, Facultad Ciensas, UNAM 04510, México
György Traser, University Sopron, Department for Forest Protection, P.O.B. 132, H-9401 Sopron, Hungary
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).   Anal spines 6............................................... 2
        Anal spines less than 6.................................... 20
 
2(1).   Eyes absent................................................. 3
        Eyes present................................................ 4
 
3(2).   Anal spines serrate; tibiotarsi without tenent hairs..........
           .............................................. lijiangensis
        Anal spines smooth; tibiotarsi with two dorsal acuminate
          tenent hairs........................................ tatrica
 
4(2).   Eyes 8 + 8.................................................. 5
        Eyes less than 7 + 7....................................... 13
 
5(4).   Furcula absent.............................................. 6
        Furcula present, but reduced....................... handschini
 
6(5).   Tibiotarsi with capitate tenent hairs....................... 7
        Tibiotarsi without capitate tenent hairs............. ladeiroi
 
7(6).   Tibiotarsi with five or more capitate tenent hairs.......... 8
        Tibiotarsi with one or two capitate tenent hairs........... 12
 
8(7).   Body with plurichaetosis.................................... 9
        Body without plurichaetosis................................ 10
 
9(8).   Apical bulb bilobated................................... rothi
        Apical bulb with three lobulations............. palafoxaliciae
 
10(8).  Anal spines rather spiniform........................ xitlensis
        Anal spines well differentiated............................ 11
 
11(10). Fifth abdominal segment and sixth abdominal segment with a
          pair of long and capitate setae each................ carlota
        Fifth abdominal segment and sixth abdominal segment without
          long and capitate setae......................... mandibulata
 
12(7).  Anal spines ciliate; tibiotarsi with two tenent hairs.........
           ............................................... bonariensis 5
        Anal spines smooth; tibiotarsi with only one tenent hair......
           .................................................. lagrecai
 
13(4).  Eyes 6 + 6....................................... nigrimontana
        Eyes less than 6 + 6....................................... 14
 
14(13). Body with plurichaetosis; eyes 5 + 5....................... 15
        Body without plurichaetosis; eyes less than 5 + 5.......... 16
 
15(14). Mucro absent; sixth abdominal segment with six capitate setae;
          tibiotarsi with 8 - 10 strong capitate tenent hairs.... fara
        Mucro present; sixth abdominal segment with acuminate setae;
          tibiotarsi with four strong capitate tenent hairs..... flava
 
16(14). Eyes 2 + 2................................................. 17
        Eyes 3 + 3................................................. 19
 
17(16). Furcula absent.................................... subterranea
        Furcula present, but reduced............................... 18
 
18(17). Dens with three dental setae; fifth abdominal segment with 2
          setae a2......................................... deharvengi
        Dens with two dental setae; fifth abdominal segment without 2
          setae a2.......................................... alaskella
 
19(16). Furcula absent...................................... daliensis
        Furcula present, but without mucro................. sexoculata
 
20(1).  Dens absent; mucro absent.................................. 21
        Dens present; mucro absent or present...................... 24
 
21(20). Tenaculum absent........................................... 22
        Tenaculum present.................................... colorata 1
 
22(21). Sixth abdominal segment with 2 spines............... monteiroi
        Sixth abdominal segment without spines..................... 23
 
23(22). Fourth antennal segment with 5 sensilla.............. haldanei 2
        Fourth antennal segment with 6 sensilla........ sphaerulaphora
 
24(20). Mucro absent............................................... 25
        Mucro present.............................................. 29
 
25(24). Sixth abdominal segment with anal spines................... 26
        Sixth abdominal segment without anal spines................ 28
 
26(25). Sixth abdominal segment with 2 anal spines.......... landwehri
        Sixth abdominal segment with 3 anal spines................. 27
 
27(26). Tenent hairs absent.................................... albida 3
        Tenent hairs present................................... albida
 
28(25). Sixth abdominal segment with 8 spiniform setae; tibiotarsi
          without tenent hairs................................ inermis
        Sixth abdominal segment without spiniform setae; tibiotarsi
          with 3 tenent hairs............................... decipiens 4
 
29(24). Tenaculum with 2 teeth on each ramus....................... 30
        Tenaculum with 3 teeth on each ramus............. decemoculata
 
30(29). Mucro minus; tibiotarsi 1 to 3 with 2, 2 and 3 tenent hairs...
           ...................................................... pati
        Mucro unciform; tibiotarsi without tenent hairs....... laszloi

Endnotes

1 Friesea gadeai(sic) sunk to synonymy with colorata by Arbea & Jordana, 1997.

2 As Friesea haldeni(sic).

3 Friesea nevadensis sunk to synonymy with albida by Arbea & Jordana, 1997.

4 As Friesea decipines(sic).

5 As Friesea bonarensis(sic).

6 Friesea subterranea caeca Rubio 1974 from Chile was excluded, because of the brief description.


Differential diagnoses

alaskella
Anal spines 6. Body without plurichaetosis. Dens with two dental setae. Eyes present. Eyes less than 7 + 7. Eyes less than 6 + 6. Eyes less than 5 + 5. Eyes 2 + 2. Fifth abdominal segment without 2 setae a2. Furcula present, but reduced.

albida
Anal spines less than 6. Dens present. Mucro absent. Mucro absent or present. Sixth abdominal segment with anal spines. Sixth abdominal segment with 3 anal spines. Tenent hairs present.

albida 3
Anal spines less than 6. Dens present. Mucro absent. Mucro absent or present. Sixth abdominal segment with anal spines. Sixth abdominal segment with 3 anal spines. Tenent hairs absent.

bonariensis 5
Anal spines 6. Anal spines ciliate. Eyes present. Eyes 8 + 8. Furcula absent. Tibiotarsi with capitate tenent hairs. Tibiotarsi with one or two capitate tenent hairs. Tibiotarsi with two tenent hairs.

carlota
Anal spines 6. Anal spines well differentiated. Body without plurichaetosis. Eyes present. Eyes 8 + 8. Fifth abdominal segment and sixth abdominal segment with a pair of long and capitate setae each. Furcula absent. Tibiotarsi with capitate tenent hairs. Tibiotarsi with five or more capitate tenent hairs.

colorata 1
Anal spines less than 6. Dens absent. Mucro absent. Tenaculum present.

daliensis
Anal spines 6. Body without plurichaetosis. Eyes present. Eyes less than 7 + 7. Eyes less than 6 + 6. Eyes less than 5 + 5. Eyes 3 + 3. Furcula absent.

decemoculata
Anal spines less than 6. Dens present. Mucro present. Mucro absent or present. Tenaculum with 3 teeth on each ramus.

decipiens 4
Anal spines less than 6. Dens present. Mucro absent. Mucro absent or present. Sixth abdominal segment without anal spines. Sixth abdominal segment without spiniform setae. Tibiotarsi with 3 tenent hairs.

deharvengi
Anal spines 6. Body without plurichaetosis. Dens with three dental setae. Eyes present. Eyes less than 7 + 7. Eyes less than 6 + 6. Eyes less than 5 + 5. Eyes 2 + 2. Fifth abdominal segment with 2 setae a2. Furcula present, but reduced.

fara
Anal spines 6. Body with plurichaetosis. Eyes present. Eyes less than 7 + 7. Eyes less than 6 + 6. Eyes 5 + 5. Mucro absent. Sixth abdominal segment with six capitate setae. Tibiotarsi with 8 – 10 strong capitate tenent hairs.

flava
Anal spines 6. Body with plurichaetosis. Eyes present. Eyes less than 7 + 7. Eyes less than 6 + 6. Eyes 5 + 5. Mucro present. Sixth abdominal segment with acuminate setae. Tibiotarsi with four strong capitate tenent hairs.

haldanei 2
Anal spines less than 6. Dens absent. Fourth antennal segment with 5 sensilla. Mucro absent. Sixth abdominal segment without spines. Tenaculum absent.

handschini
Anal spines 6. Eyes present. Eyes 8 + 8. Furcula present, but reduced.

inermis
Anal spines less than 6. Dens present. Mucro absent. Mucro absent or present. Sixth abdominal segment without anal spines. Sixth abdominal segment with 8 spiniform setae. Tibiotarsi without tenent hairs.

ladeiroi
Anal spines 6. Eyes present. Eyes 8 + 8. Furcula absent. Tibiotarsi without capitate tenent hairs.

lagrecai
Anal spines 6. Anal spines smooth. Eyes present. Eyes 8 + 8. Furcula absent. Tibiotarsi with capitate tenent hairs. Tibiotarsi with one or two capitate tenent hairs. Tibiotarsi with only one tenent hair.

landwehri
Anal spines less than 6. Dens present. Mucro absent. Mucro absent or present. Sixth abdominal segment with anal spines. Sixth abdominal segment with 2 anal spines.

laszloi
Anal spines less than 6. Dens present. Mucro unciform. Mucro present. Mucro absent or present. Tenaculum with 2 teeth on each ramus. Tibiotarsi without tenent hairs.

lijiangensis
Anal spines 6. Anal spines serrate. Eyes absent. Tibiotarsi without tenent hairs.

mandibulata
Anal spines 6. Anal spines well differentiated. Body without plurichaetosis. Eyes present. Eyes 8 + 8. Fifth abdominal segment and sixth abdominal segment without long and capitate setae. Furcula absent. Tibiotarsi with capitate tenent hairs. Tibiotarsi with five or more capitate tenent hairs.

monteiroi
Anal spines less than 6. Dens absent. Mucro absent. Sixth abdominal segment with 2 spines. Tenaculum absent.

nigrimontana
Anal spines 6. Eyes present. Eyes less than 7 + 7. Eyes 6 + 6.

palafoxaliciae
Anal spines 6. Apical bulb with three lobulations. Body with plurichaetosis. Eyes present. Eyes 8 + 8. Furcula absent. Tibiotarsi with capitate tenent hairs. Tibiotarsi with five or more capitate tenent hairs.

pati
Anal spines less than 6. Dens present. Mucro minus. Mucro present. Mucro absent or present. Tenaculum with 2 teeth on each ramus. Tibiotarsi 1 to 3 with 2, 2 and 3 tenent hairs.

rothi
Anal spines 6. Apical bulb bilobated. Body with plurichaetosis. Eyes present. Eyes 8 + 8. Furcula absent. Tibiotarsi with capitate tenent hairs. Tibiotarsi with five or more capitate tenent hairs.

sexoculata
Anal spines 6. Body without plurichaetosis. Eyes present. Eyes less than 7 + 7. Eyes less than 6 + 6. Eyes less than 5 + 5. Eyes 3 + 3. Furcula present, but without mucro.

sphaerulaphora
Anal spines less than 6. Dens absent. Fourth antennal segment with 6 sensilla. Mucro absent. Sixth abdominal segment without spines. Tenaculum absent.

subterranea
Anal spines 6. Body without plurichaetosis. Eyes present. Eyes less than 7 + 7. Eyes less than 6 + 6. Eyes less than 5 + 5. Eyes 2 + 2. Furcula absent.

tatrica
Anal spines 6. Anal spines smooth. Eyes absent. Tibiotarsi with two dorsal acuminate tenent hairs.

xitlensis
Anal spines 6. Anal spines rather spiniform. Body without plurichaetosis. Eyes present. Eyes 8 + 8. Furcula absent. Tibiotarsi with capitate tenent hairs. Tibiotarsi with five or more capitate tenent hairs.


References