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

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.

Carlos Simón Benito, F. de Ciencias, Dpto. Biología-Zoología, Universidad Autónoma de Madrid, 28049 Madrid, España
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).   Abd.IV seta p1 is macroseta................................. 2
        Abd.IV seta p1 is microseta................................ 17
        Abd.IV seta p1 has almost or are the same shape............ 28
 
2(1).   Abd.V seta a2 is as long as a1.............................. 3
        Abd.V seta a2 is longer than a1............................ 12
        Abd.V seta a2 absent....................................... 14
 
3(2).   Mesothorax medial pseudocelli between p3-p4................. 4
        Mesothorax medial pseudocelli between p5-m5................. 9
 
4(3).   Abd.IV seta m5 present...................................... 5
        Abd.IV seta m5 absent....................................... 7
 
5(4).   Metathorax seta a2 present.................................. 6
        Metathorax seta a2 absent............................. betschi
 
6(5).   Abd.VI seta l'2 present in the anal lobe.......... macrochaeta 3
        Abd.VI seta l'2 absent................................. florae
 
7(4).   Abd.VI seta l'2 present in the anal lobe.................... 8
        Abd.VI seta l'2 absent............................ krausbaueri
 
8(7).   Abd.IV seta m4 present................................. arbeai 2
        Abd.IV seta m4 absent................................ redondoi
 
9(3).   Metathorax seta a2 present; abd.VI seta l'2 absent; abd.IV
          seta x absent............................................ 10
        Metathorax seta a2 absent; abd.VI seta l'2 present in the anal
          lobe; abd.IV seta x present.............................. 11
 
10(9).  Abd.IV seta m5 present; number of dorsal pseudocelli
          metathorax 2...................................... schembrii
        Abd.IV seta m5 absent; number of dorsal pseudocelli metathorax
          1................................................... spelaea
 
11(9).  Abd.IV seta m4 present............................. sensibilis 4
        Abd.IV seta m4 absent......................... tenuisensillata 5
 
12(2).  Metathorax seta a2 present................................. 13
        Metathorax seta a2 absent.............................. simoni
 
13(12). Abd.IV seta m5 present............................... pacifica
        Abd.IV seta m5 absent.............................. hygrophila
 
14(2).  Number of dorsal pseudocelli mesothorax 0............... jirii
        Number of dorsal pseudocelli mesothorax 1.................. 15
        Number of dorsal pseudocelli mesothorax 2.............. guyana
 
15(14). Mesothorax medial pseudocelli between p3-p4; abd.IV seta m5
          present; abd.VI seta l'2 present in the anal lobe. delamarei
        Mesothorax medial pseudocelli between p5-m5; abd.IV seta m5
          absent; abd.VI seta l'2 absent........................... 16
 
16(15). Metathorax seta a2 present; abd.IV seta m4 present.. sylvatica
        Metathorax seta a2 absent; abd.IV seta m4 absent.... hylophila
 
17(1).  Abd.V seta a2 is as long as a1............................. 18
        Abd.V seta a2 is longer than a1........................ pongei
        Abd.V seta a2 absent....................................... 22
 
18(17). Mesothorax medial pseudocelli between p3-p4; abd.VI seta l'2
          present in the anal lobe................................. 19
        Mesothorax medial pseudocelli between p5-m5; abd.VI seta l'2
          absent................................................... 20
 
19(18). Abd.IV seta m5 present.............................. orousseti 1
        Abd.IV seta m5 absent.................................. yosiii
 
20(18). Metathorax seta a2 present................................. 21
        Metathorax seta a2 absent............................. rudolfi
 
21(20). Abd.IV seta m5 present............................. subitalica
        Abd.IV seta m5 absent................................. italica
 
22(17). Number of dorsal pseudocelli mesothorax 0........... atlantica
        Number of dorsal pseudocelli mesothorax 1.................. 23
        Number of dorsal pseudocelli mesothorax 2.................. 25
 
23(22). Metathorax seta a2 present................................. 24
        Metathorax seta a2 absent............................ jarmilae
 
24(23). Number of dorsal pseudocelli metathorax 1............ iowensis 6
        Number of dorsal pseudocelli metathorax 2............ iowensis 7
 
25(22). Mesothorax medial pseudocelli between p3-p4................ 26
        Mesothorax medial pseudocelli between p5-m5................ 27
 
26(25). Abd.IV seta m4 present............................... jeremiei
        Abd.IV seta m4 absent.................................... mani
 
27(25). Number of dorsal pseudocelli metathorax 1............ iowensis 8
        Number of dorsal pseudocelli metathorax 2............ iowensis 9
 
28(1).  Abd.V seta a2 is as long as a1; number of dorsal pseudocelli
          prothorax 0; number of dorsal pseudocelli abd.1 1; number of
          dorsal pseudocelli abd.2 0; number of dorsal pseudocelli
          abd.3 0.................................................. 29
        Abd.V seta a2 absent; number of dorsal pseudocelli prothorax
          1; number of dorsal pseudocelli abd.1 0; number of dorsal
          pseudocelli abd.2 1; number of dorsal pseudocelli abd.3 1...
           ............................................... maricaensis
 
29(28). Metathorax seta a2 present................................. 30
        Metathorax seta a2 absent............................ massoudi
 
30(29). Abd.IV seta m5 present............................ leitzaensis
        Abd.IV seta m5 absent............................... isochaeta

Endnotes

1 Mesaphorura orousseti, in the original description does not have a pseudocellus in the abd. V. All Mesaphorura have this pseudocellus, therefore this pseudocellus is assumed to be present in orousseti. In this way, longispina and stelae become synonyms of orousseti.

2 Mesaphorura jevanica, in the original description does not have m4 in the abd. IV. Then jevanica is a synonym of arbeai.

3 Mesaphorura jevanica, in the original pictures seta m5 is present on abd. IV. In this case jevanica is a synonym of macrochaeta.

4 Mesaphorura tenuisensillata, in the original description macrochaeta m5 is present. Then tenuisensillata is a synonym of sensibilis.

5 Sensu Simón. Mesaphorura tenuisensillata, in the original pictures macrochaeta m5 is absent. Then tenuisensillata sensu Simón is a valid species.

6 Mesaphorura iowensis is a species complex. It should be reviewed. M. critica might be synonymous.

7 Mesaphorura iowensis is a species complex. It should be reviewed.

8 Mesaphorura iowensis is a species complex. It should be reviewed.

9 Mesaphorura iowensis is a species complex. It should be reviewed.