http://www.collembola.org/key/entoidae.htm - Last updated on 2018.12.31 by Frans Janssens
Checklist of the Collembola: Key to the genera of Entomobryidae

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.

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).   Antennae with 4 segments and fourth abdominal segment at
          midline more than 2.5 times length of third............... 2
        Antennae with 5 or 6 segments or antennae with 4 segments, but
          then fourth abdominal segment at midline less than 2 times
          length of third.......................................... 43
 
2(1).   Body with scales (fig.1).................................... 3
        Body without scales........................................ 32
 

Fig.1.
 
3(2).   Head with 6 + 6 or fewer eyes............................... 4
        Head with 8 + 8 eyes....................................... 10
 
4(3).   Second antennal segment with spine-like projection (fig.2)...
           ............................................. Lepidosinella
        Second antennal segment without spine-like projection....... 5
 

Fig.2.
 
5(4).   Mucronal lamella absent..................................... 6
        Mucronal lamella projecting from end of dens (fig.3a)...... 9
 

Fig.3.
 
6(5).   Dental scales absent................................ Hawinella
        Dental scales present....................................... 7
 
7(6).   Mucro bidentate (fig.3c)................................... 8
        Mucro falcate..................................... Sinelloides
 
8(7).   Fourth antennal segment greatly swollen (fig.4)..............
           ............................................. Rambutsinella
        Fourth antennal segment not greatly swollen..... Pseudosinella
 

Fig.4.
 
9(5).   Antennae less than .5 times as long as head and body combined.
           ................................................. Sulcuncus
        Antennae more than 1.4 times as long as head and body
          combined........................................ Metasinella
 
10(3).  Mucro bidentate (fig.5c).................................. 11
        Mucro falcate (fig.5a&b).................................. 30
 

Fig.5.
 
11(10). Dental scales absent....................................... 12
        Dental scales present...................................... 16
 
12(11). Body scales ridges not unusual narrow (fig.1a, b&d)........ 13
        Body scales ridges unusual narrow (fig.1c)........ Americabrya
 
13(12). Claw with 1 or 2 unpaired inner teeth (fig.6b&c).......... 14
        Claw without unpaired inner teeth (fig.6a)........ Lepidobrya
 

Fig.6.
 
14(13). Posterior marginal scales on body segments elongate (fig.7a).
           ............................................ Janetschekbrya
        Posterior marginal scales on body segments not elongate
          (fig.7b)................................................ 15
 

Fig.7.
 
15(14). Dental spines absent................................ Willowsia
        Dental spines present (fig.8)..................... Sinhomidia
 

Fig.8.
 
16(11). Body scales dark pointed and heavily striate; sixth abdominal
          segment with finger like projection (fig.9)..... Epimetrura
        Body scales varied; sixth abdominal segment without finger
          like projection.......................................... 17
 

Fig.9.
 
17(16). Dental spines absent....................................... 18
        Dental spines present (fig.10)............................. 29
 

Fig.10.
 
18(17). Body scales all rounded or truncate (fig.11c&d); body scales
          striated finely.......................................... 19
        Body scales some apically pointed (fig.11a&b); body scales
          striated heavily......................................... 27
 

Fig.11.
 
19(18). Dental basal appendix absent............................... 20
        Dental basal appendix present (fig.12)..................... 21
 

Fig.12.
 
20(19). Antennae and legs not scaled....................... Lanocyrtus
        Antennae and legs scaled......................... Lepidocyrtus
 
21(19). Dental appendix pointed (fig.12b).......................... 22
        Dental appendix rounded (fig.12a).......................... 24
 
22(21). Ventral tube scales absent......................... Acrocyrtus
        Ventral tube scales present................................ 23
 
23(22). Ventral tube scaled on both faces................. Onerocyrtus
        Ventral tube scaled on posterior face only......... Carocyrtus
 
24(21). Mucronal basal spine simple................................ 25
        Mucronal basal spine with spinelet (fig.13)........ Setogaster
 

Fig.13.
 
25(24). First antennal segment and femur not scaled................ 26
        First antennal segment and femur scaled............ Dahlcyrtus
 
26(25). Mouthparts not projecting........................ Cinctocyrtus
        Mouthparts projecting, labrum (fig.14a), labium (fig.14b) and
          mandibles (fig.14c) elongate.................. Rhynchocyrtus
 

Fig.14.
 
27(18). Manubrium with distal thick blunt macrochaetae (fig.15).......
           ........................................... Lepidocyrtoides
        Manubrium without distal thick blunt macrochaetae.......... 28
 

Fig.15.
 
28(27). Colour of body scales all dark brown; dens scaled on only
          basal half......................................... Vietsira
        Colour of body scales some hyaline; dens scaled for most of
          ventral surface.................................. Lepidosira
 
29(17). Body scales all rounded and finely striate; macrochaetae rare
          on dorsal body except collar; scales hyaline; antenna
          without apical bulb............................ Acanthurella
        Body scales mainly pointed and coarsely striate; macrochaetae
          numerous on whole body; scales brown; antenna with apical
          bulb.......................................... Acanthocyrtus
 
30(10). Dens with scales........................................ Seira
        Dens without scales........................................ 31
 
31(30). Mucronal basal spine absent (fig.5a)................ Desertia
        Mucronal basal spine present (fig.5b)............ Drepanosira
 
32(2).  Head with 6 + 6 or fewer eyes.............................. 33
        Head with 8 + 8 eyes....................................... 34
 
33(32). Furca with bidentate mucro (fig.16c).................. Sinella
        Furca with falcate mucro (fig.16a).................. Coecobrya
 

Fig.16.
 
34(32). Mucro bidentate (fig.16c).................................. 35
        Mucro falcate (fig.16a&b).................................. 40
 
35(34). Intersegmental membranes with many microsetae (fig.17)........
           ............................................... Marginobrya
        Intersegmental membranes without microsetae................ 36
 

Fig.17.
 
36(35). Dental spines absent....................................... 37
        Dental spines present at basis (fig.18)............... Homidia
 

Fig.18.
 
37(36). Body setae flattened, scale like (fig.19).......... Himalanura
        Body setae not flattened................................... 38
 

Fig.19.
 
38(37). Antenna usually with apical bulb; inner tibiotarsal setae with
          all setae similar (fig.20b).............................. 39
        Antenna without apical bulb; inner tibiotarsal setae with some
          setae apparently much more finely ciliate than others
          (fig.20a).................................... Entomobryoides
 

Fig.20.
 
39(38). Mucronal basal spine absent (fig.21a)............. Mesentotoma
        Mucronal basal spine present (fig.21b)............. Entomobrya
 

Fig.21.
 
40(34). Lasiotrichia or large macrochaetae bases absent on anterior
          margin of thorax............................... Prodrepanura
        Lasiotrichia or large macrochaetae bases present on anterior
          margin of thorax......................................... 41
 
41(40). Mucronal basal spine absent (fig.16b)...................... 42
        Mucronal basal spine present (fig.16a).............. Drepanura
 
42(41). Claw with four inner teeth............................... Calx
        Claw with one or two inner teeth.................... Isotobrya
 
43(1).  Body with scales (fig.1)................................... 44
        Body without scales........................................ 51
 
44(43). Antennae with 5 segments (fig.22b).......................... 45
        Antennae with 6 segments (fig.22a).......................... 49
 

Fig.22.
 
45(44). Scales hyaline and fusiform (fig.1a) absent from antennae and
          furcula........................................ Mastigoceras
        Scales strongly and apically rounded or truncate (fig.1b)
          present on antennae and furcula.......................... 46
 
46(45). Fourth antennal segment clearly annulate (fig.23)..............
           ............................................. Verhoeffiella
        Fourth antennal segment not annulate....................... 47
 

Fig.23.
 
47(46). First abdominal segment with at least 1 + 1 macrochaetae
          (fig.24).................................................. 48
        First abdominal segment without macrochaetae...... Heteromurus
 

Fig.24.
 
48(47). Dental spines absent.......................... Heteromurtrella
        Dental spines present (fig.25)...................... Alloscopus
 

Fig.25.
 
49(44). Fully developed scales fusiform (fig.1a)..... Dicranorchesella
        Fully developed scales rounded or truncate (fig.1b)........ 50
 
50(49). Prelabral setae bifurcate (fig.26)........ Pseudodicranocentrus
        Prelabral setae not bifurcate.................. Dicranocentrus
 

Fig.26.
 
51(43). Postantennal organ absent.................................. 52
        Postantennal organ rudimentary (fig.27)..................... 56
 

Fig.27.
 
52(51). Head with 2 + 2 or fewer eyes.............................. 53
        Head with 7 + 7 or more eyes............................... 54
 
53(52). Mucro with strong anteapical tooth (fig.28b)...... Neorchesella
        Mucro with very weak anteapical tooth (fig.28a).... Bessoniella
 

Fig.28.
 
54(52). Second antennal segment not subsegmented (fig.22b&c)........ 55
        Second antennal segment subsegmented (fig.22a)...... Orchesella
 
55(54). First antennal segment not subdivided (fig.22c).... Corynothrix
        First antennal segment subdivided (fig.22b)...... Orchesellides
 
56(51). Mucro bidentate (fig.29b)...................... Australotomurus
        Mucro falcate (fig.29a)..................................... 57
 

Fig.29.
 
57(56). Unguis with three longitudinal ridges............. Hispanobrya
        Unguis without longitudinal ridges......................... 58
 
58(57). Postantennal organ 15 times 5 micron, narrowed in its inner
          side.............................................. Nothobrya
        Postantennal organ less than 4 micron across simple and flat..
           ................................................... Capbrya


Differential diagnoses

Acanthocyrtus
Antenna with apical bulb. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales mainly pointed and coarsely striate. Dental scales present. Dental spines present (fig.10). Head with 8 + 8 eyes. Macrochaetae numerous on whole body. Mucro bidentate (fig.5c). Scales brown. Sixth abdominal segment without finger like projection.

Acanthurella
Antenna without apical bulb. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded and finely striate. Dental scales present. Dental spines present (fig.10). Head with 8 + 8 eyes. Macrochaetae rare on dorsal body except collar. Mucro bidentate (fig.5c). Scales hyaline. Sixth abdominal segment without finger like projection.

Acrocyrtus
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental appendix pointed (fig.12b). Dental basal appendix present (fig.12). Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Sixth abdominal segment without finger like projection. Ventral tube scales absent.

Alloscopus
Antennae with 5 segments (fig.22b). Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body with scales (fig.1). Dental spines present (fig.25). First abdominal segment with at least 1 + 1 macrochaetae (fig.24). Fourth antennal segment not annulate. Scales strongly and apically rounded or truncate (fig.1b) present on antennae and furcula.

Americabrya
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales ridges unusual narrow (fig.1c). Dental scales absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c).

Australotomurus
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. Mucro bidentate (fig.29b). Postantennal organ rudimentary (fig.27).

Bessoniella
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. Head with 2 + 2 or fewer eyes. Mucro with very weak anteapical tooth (fig.28a). Postantennal organ absent.

Calx
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Claw with four inner teeth. First antennal segment not subdivided. Head with 8 + 8 eyes. Lasiotrichia or large macrochaetae bases present on anterior margin of thorax. Mucro falcate (fig.16a&b). Mucronal basal spine absent (fig.16b).

Capbrya
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. Mucro falcate (fig.29a). Postantennal organ rudimentary (fig.27). Postantennal organ less than 4 micron across simple and flat. Unguis without longitudinal ridges.

Carocyrtus
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental appendix pointed (fig.12b). Dental basal appendix present (fig.12). Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Sixth abdominal segment without finger like projection. Ventral tube scaled on posterior face only. Ventral tube scales present.

Cinctocyrtus
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental appendix rounded (fig.12a). Dental basal appendix present (fig.12). Dental scales present. Dental spines absent. First antennal segment and femur not scaled. Head with 8 + 8 eyes. Mouthparts not projecting. Mucro bidentate (fig.5c). Mucronal basal spine simple. Sixth abdominal segment without finger like projection.

Coecobrya
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Furca with falcate mucro (fig.16a). Head with 6 + 6 or fewer eyes.

Corynothrix
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. First antennal segment not subdivided (fig.22c). Head with 7 + 7 or more eyes. Postantennal organ absent. Second antennal segment not subsegmented (fig.22b&c).

Dahlcyrtus
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental appendix rounded (fig.12a). Dental basal appendix present (fig.12). Dental scales present. Dental spines absent. First antennal segment and femur scaled. Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Mucronal basal spine simple. Sixth abdominal segment without finger like projection.

Desertia
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Dens without scales. Head with 8 + 8 eyes. Mucro falcate (fig.5a&b). Mucronal basal spine absent (fig.5a).

Dicranocentrus
Antennae with 6 segments (fig.22a). Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body with scales (fig.1). Fully developed scales rounded or truncate (fig.1b). Prelabral setae not bifurcate.

Dicranorchesella
Antennae with 6 segments (fig.22a). Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body with scales (fig.1). Fully developed scales fusiform (fig.1a).

Drepanosira
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Dens without scales. Head with 8 + 8 eyes. Mucro falcate (fig.5a&b). Mucronal basal spine present (fig.5b).

Drepanura
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. First antennal segment not subdivided. Head with 8 + 8 eyes. Lasiotrichia or large macrochaetae bases present on anterior margin of thorax. Mucro falcate (fig.16a&b). Mucronal basal spine present (fig.16a).

Entomobrya
Antenna usually with apical bulb. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Body setae not flattened. Dental spines absent. First antennal segment not subdivided. Head with 8 + 8 eyes. Inner tibiotarsal setae with all setae similar (fig.20b). Intersegmental membranes without microsetae. Mucro bidentate (fig.16c). Mucronal basal spine present (fig.21b).

Entomobryoides
Antenna without apical bulb. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Body setae not flattened. Dental spines absent. First antennal segment not subdivided. Head with 8 + 8 eyes. Inner tibiotarsal setae with some setae apparently much more finely ciliate than others (fig.20a). Intersegmental membranes without microsetae. Mucro bidentate (fig.16c).

Epimetrura
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales dark pointed and heavily striate. Dental scales present. Head with 8 + fig.24 eyes. Mucro bidentate (fig.5c). Sixth abdominal segment with finger like projection (fig.9).

Hawinella
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Dental scales absent. Head with 6 + 6 or fewer eyes. Mucronal lamella absent. Second antennal segment without spine-like projection.

Heteromurtrella
Antennae with 5 segments (fig.22b). Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body with scales (fig.1). Dental spines absent. First abdominal segment with at least 1 + 1 macrochaetae (fig.24). Fourth antennal segment not annulate. Scales strongly and apically rounded or truncate (fig.1b) present on antennae and furcula.

Heteromurus
Antennae with 5 segments (fig.22b). Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body with scales (fig.1). First abdominal segment without macrochaetae. Fourth antennal segment not annulate. Scales strongly and apically rounded or truncate (fig.1b) present on antennae and furcula.

Himalanura
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Body setae flattened, scale like (fig.19). Dental spines absent. First antennal segment not subdivided. Head with 8 + 8 eyes. Intersegmental membranes without microsetae. Mucro bidentate (fig.16c).

Hispanobrya
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. Mucro falcate (fig.29a). Postantennal organ rudimentary (fig.27). Unguis with three longitudinal ridges.

Homidia
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Dental spines present at basis (fig.18). First antennal segment not subdivided. Head with 8 + 8 eyes. Intersegmental membranes without microsetae. Mucro bidentate (fig.16c).

Isotobrya
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Claw with one or two inner teeth. First antennal segment not subdivided. Head with 8 + 8 eyes. Lasiotrichia or large macrochaetae bases present on anterior margin of thorax. Mucro falcate (fig.16a&b). Mucronal basal spine absent (fig.16b).

Janetschekbrya
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales ridges not unusual narrow (fig.1a, b&d). Claw with 1 or 2 unpaired inner teeth (fig.6b&c). Dental scales absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Posterior marginal scales on body segments elongate (fig.7a).

Lanocyrtus
Antennae and legs not scaled. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental basal appendix absent. Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Sixth abdominal segment without finger like projection.

Lepidobrya
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales ridges not unusual narrow (fig.1a, b&d). Claw without unpaired inner teeth (fig.6a). Dental scales absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c).

Lepidocyrtoides
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales some apically pointed (fig.11a&b). Body scales striated heavily. Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Manubrium with distal thick blunt macrochaetae (fig.15). Mucro bidentate (fig.5c). Sixth abdominal segment without finger like projection.

Lepidocyrtus
Antennae and legs scaled. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental basal appendix absent. Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Sixth abdominal segment without finger like projection.

Lepidosinella
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Head with 6 + 6 or fewer eyes. Second antennal segment with spine-like projection (fig.2).

Lepidosira
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales some apically pointed (fig.11a&b). Body scales striated heavily. Colour of body scales some hyaline. Dens scaled for most of ventral surface. Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Manubrium without distal thick blunt macrochaetae. Mucro bidentate (fig.5c). Sixth abdominal segment without finger like projection.

Marginobrya
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. First antennal segment not subdivided. Head with 8 + 8 eyes. Intersegmental membranes with many microsetae (fig.17). Mucro bidentate (fig.16c).

Mastigoceras
Antennae with 5 segments (fig.22b). Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body with scales (fig.1). Scales hyaline and fusiform (fig.1a) absent from antennae and furcula.

Mesentotoma
Antenna usually with apical bulb. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Body setae not flattened. Dental spines absent. First antennal segment not subdivided, or subdivided. Head with 8 + 8 eyes. Inner tibiotarsal setae with all setae similar (fig.20b). Intersegmental membranes without microsetae. Mucro bidentate (fig.16c). Mucronal basal spine absent (fig.21a).

Metasinella
Antennae more than 1.4 times as long as head and body combined. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Head with 6 + 6 or fewer eyes. Mucronal lamella projecting from end of dens (fig.3a). Second antennal segment without spine-like projection.

Neorchesella
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. Head with 2 + 2 or fewer eyes. Mucro with strong anteapical tooth (fig.28b). Postantennal organ absent.

Nothobrya
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. Mucro falcate (fig.29a). Postantennal organ rudimentary (fig.27). Postantennal organ 15 times 5 micron, narrowed in its inner side. Unguis without longitudinal ridges.

Onerocyrtus
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental appendix pointed (fig.12b). Dental basal appendix present (fig.12). Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Sixth abdominal segment without finger like projection. Ventral tube scaled on both faces. Ventral tube scales present.

Orchesella
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. Head with 7 + 7 or more eyes. Postantennal organ absent. Second antennal segment subsegmented (fig.22a).

Orchesellides
Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body without scales. First antennal segment subdivided (fig.22b). Head with 7 + 7 or more eyes. Postantennal organ absent. Second antennal segment not subsegmented (fig.22b&c).

Prodrepanura
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. First antennal segment not subdivided. Head with 8 + 8 eyes. Lasiotrichia or large macrochaetae bases absent on anterior margin of thorax. Mucro falcate (fig.16a&b).

Pseudodicranocentrus
Antennae with 6 segments (fig.22a). Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body with scales (fig.1). Fully developed scales rounded or truncate (fig.1b). Prelabral setae bifurcate (fig.26).

Pseudosinella
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Dental scales present. Fourth antennal segment not greatly swollen. Head with 6 + 6 or fewer eyes. Mucro bidentate (fig.3c). Mucronal lamella absent. Second antennal segment without spine-like projection.

Rambutsinella
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Dental scales present. Fourth antennal segment greatly swollen (fig.4). Head with 6 + 6 or fewer eyes. Mucro bidentate (fig.3c). Mucronal lamella absent. Second antennal segment without spine-like projection.

Rhynchocyrtus
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental appendix rounded (fig.12a). Dental basal appendix present (fig.12). Dental scales present. Dental spines absent. First antennal segment and femur not scaled. Head with 8 + 8 eyes. Mouthparts projecting, labrum (fig.14a), labium (fig.14b) and mandibles (fig.14c) elongate. Mucro bidentate (fig.5c). Mucronal basal spine simple. Sixth abdominal segment without finger like projection.

Seira
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Dens with scales. Head with 8 + 8 eyes. Mucro falcate (fig.5a&b).

Setogaster
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales all rounded or truncate (fig.11c&d). Body scales striated finely. Dental appendix rounded (fig.12a). Dental basal appendix present (fig.12). Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Mucronal basal spine with spinelet (fig.13). Sixth abdominal segment without finger like projection.

Sinella
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body without scales. Furca with bidentate mucro (fig.16c). Head with 6 + 6 or fewer eyes.

Sinelloides
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Dental scales present. Head with 6 + 6 or fewer eyes. Mucro falcate. Mucronal lamella absent. Second antennal segment without spine-like projection.

Sinhomidia
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales ridges not unusual narrow (fig.1a, b&d). Claw with 1 or 2 unpaired inner teeth (fig.6b&c). Dental scales absent. Dental spines present (fig.8). Head with 8 + 8 eyes. Mucro bidentate (fig.5c). Posterior marginal scales on body segments not elongate (fig.7b).

Sulcuncus
Antennae less than .5 times as long as head and body combined. Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Head with 6 + 6 or fewer eyes. Mucronal lamella projecting from end of dens (fig.3a). Second antennal segment without spine-like projection.

Verhoeffiella
Antennae with 5 segments (fig.22b). Antennae with 5 or 6 segments or antennae with 4 segments, but then fourth abdominal segment at midline less than 2 times length of third. Body with scales (fig.1). Fourth antennal segment clearly annulate (fig.23). Scales strongly and apically rounded or truncate (fig.1b) present on antennae and furcula.

Vietsira
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales varied. Body scales some apically pointed (fig.11a&b). Body scales striated heavily. Colour of body scales all dark brown. Dens scaled on only basal half. Dental scales present. Dental spines absent. Head with 8 + 8 eyes. Manubrium without distal thick blunt macrochaetae. Mucro bidentate (fig.5c). Sixth abdominal segment without finger like projection.

Willowsia
Antennae with 4 segments and fourth abdominal segment at midline more than 2.5 times length of third. Body with scales (fig.1). Body scales ridges not unusual narrow (fig.1a, b&d). Claw with 1 or 2 unpaired inner teeth (fig.6b&c). Dental scales absent. Dental spines absent. Head with fig.24 + 8 eyes. Mucro bidentate (fig.5c). Posterior marginal scales on body segments not elongate (fig.7b).


References