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

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.

Rafael Jordana, Department of Zoology and Ecology, University of Navarra, 31080, Pamplona, Navarra, Spain
Enrique Baquero, Department of Zoology and Ecology, University of Navarra, 31080, Pamplona, Navarra, Spain
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).   Ocelli 6 + 6................................................ 2
        Ocelli at most 5 + 5....................................... 14
 
2(1).   Mucro with subapical denticles.............................. 3
        Mucro without subapical denticles........................... 7
 
3(2).   Mucro with one subapical denticle........................... 4
        Mucro with two to four subapical denticles.................. 6
 
4(3).   Mucro with 1 basal tooth.................................... 5
        Mucro with 2 basal teeth........................... carpaticus
 
5(4).   Dental spine formula 4-7 I - II + 3-4 I 3-6 I; unguis with 1-2
          internal teeth.............................. brevimucronatus
        Dental spine formula 5-8 + 5 I 2 I; unguis with 3 internal
          teeth............................................. edaphicus
 
6(3).   Unguiculus with 1 tooth............................... wilkeyi
        Unguiculus without tooth..................... vigintiferispina
 
7(2).   Tenent hair clavate......................................... 8
        Tenent hair pointed........................................ 13
 
8(7).   Unguiculus with internal tooth.............................. 9
        Unguiculus without internal tooth................... birsteini
 
9(8).   Dental spine formula 5 I + 9 I.................... unidentatus
        Dental spine formula not 5 I + 9 I......................... 10
 
10(9).  Spine-like chaetae on tibiotarsi: 001, 012 or 002.......... 11
        Spine-like chaetae on tibiotarsi: 011................ borealis
 
11(10). Mucro with 1 basal tooth........................... belozerovi
        Mucro with 2 basal teeth................................... 12
 
12(11). Dental spine formula 4-5 I + 6 I 3 I; third tibiotarsus with
          one spine-like chaeta......................... jeleznovodski
        Dental spine formula 6-9 + 9-13 I; third tibiotarsus with two
          spine-like chaetae............................. baschkiricus
 
13(7).  Prelabral chaetae 2 + 2; third tibiotarsus with two spine-like
          chaetae.......................................... abchasicus
        Prelabral chaetae 3 + 3; third tibiotarsus with one spine-like
          chaeta.......................................... kelasuricus
 
14(1).  Ocelli 4 + 4 or 5 + 5...................................... 15
        Ocelli at most 3 + 3....................................... 16
 
15(14). Mucro with 3 or 4 subapical denticles............ riugadoensis
        Mucro without subapical denticles...................... sorosi
 
16(14). Ocelli 3 + 3............................................. leei
        Ocelli at most 2 + 2....................................... 17
 
17(16). Ocelli 2 + 2.................................... diversispinus
        Ocelli absent.............................................. 18
 
18(17). Prelabral chaetae 2 + 2 or 3 + 3........................... 19
        Prelabral chaetae 4 + 4........................... marmorarius
 
19(18). Prelabral chaetae 2 + 2.................................... 20
        Prelabral chaetae 3 + 3.................................... 22
 
20(19). Mucro with subapical denticles............................. 21
        Mucro without subapical denticles.................. yamatensis
 
21(20). Mucro with 1 subapical denticle................... suzukaensis
        Mucro with 4 subapical denticles................. californicus
 
22(19). Mucro with subapical denticles............................. 23
        Mucro without subapical denticles.......................... 25
 
23(22). Unguis with 1 or 2 internal teeth.......................... 24
        Unguis with 3 or 4 internal teeth..................... grahami
 
24(23). Dental spine formula 8-12 + 1-5 I 1 I 1 I 1-2 I........... gul
        Dental spine formula 8 + 3 I 1-2 I 2 I.............. ehimensis
 
25(22). Unguiculus with internal tooth............................. 26
        Unguiculus without internal tooth................... kawasawai
 
26(25). Dental spine formula 7-9 I + I 2-3 I 2-3 I 2 I................
           .......................................... ortobalaganensis
        Dental spine formula 9 3 + I 1 I 1 I 2 I............ iwatensis

Endnotes

1 In the dental spine formula "I" denotes "large spine".


Differential diagnoses

abchasicus
Mucro without subapical denticles. Ocelli 6 + 6. Prelabral chaetae 2 + 2. Tenent hair pointed. Third tibiotarsus with two spine-like chaetae.

baschkiricus
Dental spine formula 6–9 + 9–13 I. Dental spine formula not 5 I + 9 I. Mucro without subapical denticles. Mucro with 2 basal teeth. Ocelli 6 + 6. Spine-like chaetae on tibiotarsi: 001, 012 or 002. Tenent hair clavate. Third tibiotarsus with two spine-like chaetae. Unguiculus with internal tooth.

belozerovi
Dental spine formula not 5 I + 9 I. Mucro without subapical denticles. Mucro with 1 basal tooth. Ocelli 6 + 6. Spine-like chaetae on tibiotarsi: 001, 012 or 002. Tenent hair clavate. Unguiculus with internal tooth.

birsteini
Mucro without subapical denticles. Ocelli 6 + 6. Tenent hair clavate. Unguiculus without internal tooth.

borealis
Dental spine formula not 5 I + 9 I. Mucro without subapical denticles. Ocelli 6 + 6. Spine-like chaetae on tibiotarsi: 011. Tenent hair clavate. Unguiculus with internal tooth.

brevimucronatus
Dental spine formula 4–7 I - II + 3–4 I 3–6 I. Mucro with subapical denticles. Mucro with one subapical denticle. Mucro with 1 basal tooth. Ocelli 6 + 6. Unguis with 1–2 internal teeth.

californicus
Mucro with subapical denticles. Mucro with 4 subapical denticles. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 2 + 2.

carpaticus
Mucro with subapical denticles. Mucro with one subapical denticle. Mucro with 2 basal teeth. Ocelli 6 + 6.

diversispinus
Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli 2 + 2.

edaphicus
Dental spine formula 5–8 + 5 I 2 I. Mucro with subapical denticles. Mucro with one subapical denticle. Mucro with 1 basal tooth. Ocelli 6 + 6. Unguis with 3 internal teeth.

ehimensis
Dental spine formula 8 + 3 I 1–2 I 2 I. Mucro with subapical denticles. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 3 + 3. Unguis with 1 or 2 internal teeth.

grahami
Mucro with subapical denticles. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 3 + 3. Unguis with 3 or 4 internal teeth.

gul
Dental spine formula 8–12 + 1–5 I 1 I 1 I 1–2 I. Mucro with subapical denticles. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 3 + 3. Unguis with 1 or 2 internal teeth.

iwatensis
Dental spine formula 9 3 + I 1 I 1 I 2 I. Mucro without subapical denticles. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 3 + 3. Unguiculus with internal tooth.

jeleznovodski
Dental spine formula 4–5 I + 6 I 3 I. Dental spine formula not 5 I + 9 I. Mucro without subapical denticles. Mucro with 2 basal teeth. Ocelli 6 + 6. Spine-like chaetae on tibiotarsi: 001, 012 or 002. Tenent hair clavate. Third tibiotarsus with one spine-like chaeta. Unguiculus with internal tooth.

kawasawai
Mucro without subapical denticles. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 3 + 3. Unguiculus without internal tooth.

kelasuricus
Mucro without subapical denticles. Ocelli 6 + 6. Prelabral chaetae 3 + 3. Tenent hair pointed. Third tibiotarsus with one spine-like chaeta.

leei
Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli 3 + 3.

marmorarius
Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 4 + 4.

ortobalaganensis
Dental spine formula 7–9 I + I 2–3 I 2–3 I 2 I. Mucro without subapical denticles. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 3 + 3. Unguiculus with internal tooth.

riugadoensis
Mucro with 3 or 4 subapical denticles. Ocelli at most 5 + 5. Ocelli 4 + 4 or 5 + 5.

sorosi
Mucro without subapical denticles. Ocelli at most 5 + 5. Ocelli 4 + 4 or 5 + 5.

suzukaensis
Mucro with subapical denticles. Mucro with 1 subapical denticle. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 2 + 2.

unidentatus
Dental spine formula 5 I + 9 I. Mucro without subapical denticles. Ocelli 6 + 6. Tenent hair clavate. Unguiculus with internal tooth.

vigintiferispina
Mucro with subapical denticles. Mucro with two to four subapical denticles. Ocelli 6 + 6. Unguiculus without tooth.

wilkeyi
Mucro with subapical denticles. Mucro with two to four subapical denticles. Ocelli 6 + 6. Unguiculus with 1 tooth.

yamatensis
Mucro without subapical denticles. Ocelli at most 5 + 5. Ocelli at most 3 + 3. Ocelli at most 2 + 2. Ocelli absent. Prelabral chaetae 2 + 2 or 3 + 3. Prelabral chaetae 2 + 2.


References