Key to Australian Camponotus species

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The following key to Australian Camponotus species (see Australian list) is based on McArthur (2007[1]). Note that this key is currently incomplete. See missing taxa for a list of species yet to be added.


1

  • Metapleural gland present above the hind coxae; dorsum of mesosoma with thick, bright yellow hairs => Camponotus thadeus
Camponotus thadeus casent0172134 profile 1.jpg
  • Metapleural gland absent, dorsum of mesosoma with at most thin; pale elongate hairs => 2

2

  • Fore femur twice as thick as mid- and hind femur; frontal carinae wide (macrocephalus group) => 23
  • Otherwise => 3

3

  • Anterior clypeal margin with a deep concavity bordered by two teeth (more so in major) (nigriceps group) => 33
  • Anterior clypeal margin otherwise => 4

4

  • About 6 coarse J-shaped setae on the underside of head (wiederkehri group) => 41
  • Otherwise => 5

5

  • Sides of head straight, near parallel, vertex straight, eyes at corners (ephippium group) => 54
  • Head otherwise => 6

6

  • Closely covered with coarse punctations (whitei group) => 61
  • Without course punctations => 7

7

  • Propodeum dorsum concave => 8
  • Propodeum dorsum straight or convex => 11

8

  • Small, HW < 1.2 in minor workers (sponsorum group) => 69
  • Large, HW > 1.2 in minor workers => 9

9

10

  • Plentiful short setae (L < EL) covering mesosoma (intrepidus group) => 62
  • Long setae (L > EL) on mesosoma (chalceus group) => 65

11

  • With distinct propodeal angle => 12
  • Without distinct propodeal angle => 17

12

  • Gaster with short overlapping setae (aeneopilosus group) => 70
  • Gaster without short overlapping setae => 13

13

  • Head sides tapering to rear, anterior clypeal margin not concave, PD/D < 3.5 (subnitidus group) => 71
  • Otherwise => 14

14

  • Length of mesonotum + propodeum more than twice height of propodeum => 15
  • Length of mesonotum + propodeum less than twice height of propodeum => 19

15

  • Major worker with anterior margin of clypeus broadly concave and sides of head tapering to the front (maculatus group) => 74
  • Major worker with sides of head convex => 16

16

  • Mesosoma black (darlingtoni group) => 80
  • Mesosoma not all black (scotti group) => 84

17

  • Curvature of pronotum similar to mesonotum and propodeum (esau group) => 88
  • Curvature of pronotum dissimilar to mesonotum and propodeum => 18

18

  • Mesosoma all yellow (gibbinotus group) => 90
  • Mesosoma not all yellow (walkeri group) => 91

19

  • Mesosoma all red (armstrongi group) => 92
  • Mesosoma not all red => 20

20

  • Finely punctate (evae group) => 93
  • Not punctate => 21

21

  • Scapes and tibiae with short, erect hairs (rubiginosus group) => 95
  • Scapes and tibiae without short, erect hairs => 22

22

  • Dorsal face of propodeum shorter than posterior face (oetkeri group) => 98
  • Dorsal face of propodeum longer than posterior face (claripes group) => 99

23

  • Number of erect setae on mesonotum > 5 => 24
  • Number of erect setae on mesonotum < 5 => 28

24

  • Erect setae on mesosoma short (L < half EL) => Colobopsis annetteae
  • Erect setae on mesosoma long (L > half EL) => 25

25

  • Propodeum strongly convex and dome-like => 27
  • Propodeum weakly convex to weakly concave => 26

26

Camponotus janeti casent0910518 p 1 high.jpg
Camponotus mackayensis casent0910531 p 1 high.jpg

27

Camponotus-vitreusLMa2.jpg

28

  • Propodeum separated from mesonotum => 29
  • Propodeum and mesonotum forming a continuous surface => 30

29

Camponotus conithorax casent0280183 p 1 high.jpg
Camponotus gasseri casent0280186 p 1 high.jpg

30

Camponotus sanguinifrons casent0911631 p 1 high.jpg
  • Dorsal propodeal face < 1.5x posterior face => 31

31

  • Eyes placed cloer to mandibles than vertex => Colobopsis anderseni
  • Eyes placed closer to vertex than mandibles => 32

32

33

  • Underside of head without erect setae => 34
  • Underside of head with erect setae => 36

34

35

36

  • Underside of head with > 20 erect hairs => 37
  • Underside of head with < 20 erect hairs => 39

37

  • Propodeal setae mostly confined to angle => Camponotus dryandrae
  • Propodeal setae mostly evenly scattered => 38

38

39

40

41

42

  • Tibiae with erect setae => 43
  • Tibiae without erect setae (ignoring spikes inside) => 45

43

44

45

  • Mesosoma strongly arched, corners of head produced => Camponotus postcornutus
  • Mesosoma elongate, corners of head not produced => 46

46

  • Metanotal groove below propodeum => 47
  • Metanotal groove not depressed below propodeum => 50

47

  • Pronotum darker than mesonotum and propodeum => Camponotus arenatus
  • Pronotum and mesonotum colour uniform => 48

48

  • Erect setae on mesonotum sparse or obsolete => 49
  • Plentiful erect setae on mesonotum => Camponotus owensae

49

50

51

52

53

54

55

56

  • Tibia with setae raised to 20 degrees (ignoring spikes inside) => Camponotus ephippium
  • Tibia with setae raised to 5 degrees, or flay-lying (ignoring spikes inside) => 57

57

  • Under head lacking erect setae => 58
  • Under head with erect setae => 60

58

59

60

61

62

  • Gaster with dense short overlapping setae => 63
  • Gaster without short overlapping setae => 64

63

  • Propodeum convex, raised above metanotum => Camponotus piliventris (currently a junior synonym of C. suffusus)
  • Propodeum flat, not raised above mesonotum => Camponotus suffusus

64

65

  • Part of propodeum red, otherwise black => 66
  • All mesosoma black or reddish => 68

66

67

68

69

70

71

72

73

74

  • Gaster with golden short flat-lying setae => Camponotus oxleyi
  • Gaster without golden short flat-lying setae => 75

75

  • Elongate, dorsal propodeal face > 3.5x posterior face => Camponotus extensus
  • Shorter, dorsal propodeal face < 3.5x posterior face => 76

76

78

79

80

  • Erect setae under head => 81
  • No erect setae under head => 82

81

82

83

84

85

  • Mesosoma with short curved setae => Camponotus scotti
  • Mesosoma without short curved setae => 86

86

87

88

90

91

  • Major worker, in side view, without propodeal angle; minor worker, frontal carinae sinuous => Camponotus adami
  • Major worker, in side view, with propodeal angle; minor worker, frontal carinae near parallel => Camponotus walkeri

92

93

94

95

96

97

98

99

100



Species not yet included in this key

References

  1. McArthur, A. J. 2007. A key to Camponotus Mayr of Australia. Pages 290-351 in Snelling, R. R., B. L. Fisher and P. S. Ward. Advances in ant systematics (Hymenoptera: Formicidae): Homage to E.O. Wilson - 50 years of contributions. Memoirs of the American Entomological Institute, vol. 80.