Key to Camponotus Myrmamblys inquilinus species group

This key to workers is based on a key from: Zettel, H., Balàka, P., Yamane, S., Laciny, A., Lim, L., Druzhinina, I.S. 2018. New mimetic ants from Southeast Asia – the Camponotus (Myrmamblys) inquilinus group (Hymenoptera: Formicidae: Camponotini). Zeitschrift der Arbeitsgemeinschaft Österreichischer Entomologen 70:125-174.

1

Head (and mesosoma and gaster) very dark brown or black, at most somewhat reddish anteriorly . . . . . 2

Head yellowish, brownish, orange, or red . . . . . 5

2

return to couplet #1

Gaster tergites and dorsal parts of mesosoma with dense yellow to golden pubescent. Myanmar, Thailand . . . . . Camponotus paraleonardi

Gaster and mesosoma with much less conspicuous, whitish pubescence . . . . . 3

3

return to couplet #2

Both minor and major with narrow but distinct pale hind margins of gaster tergites 1–4. Head of major without microsculpture, strongly shiny. Simeulue Island near Sumatra . . . . . Camponotus kutteri

Minor and major without or with very inconspicuous pale hind margins of gaster tergites. Head of major with reticulated microsculpture over large parts of head dorsum, partly matt . . . . . 4

4

return to couplet #3

Posterior margin of clypeus in both minor and major triangularly incised. Major worker with about 12–16 groove-like punctures on clypeus, and genae with some comparatively large punctures (both sometimes indistinct). Scape chiefly blackish brown; funicular segments 1 and 2 of similar colour, with orange base (minor) or entirely orange-brown (major), rarely entire funiculus strongly infuscated. Borneo . . . . . Camponotus paracolobopsis

Posterior margin of clypeus in minor almost straight, in major with a deep medial furrow. Major worker with about 6–8 large groove-like punctures on clypeus, no such punctures on genae. Scape chiefly orange coloured; in minor orangebrown funicular segment 1 strongly contrasting with black segment 2. Philippines (Luzon) . . . . . Camponotus benguetensis

5

return to couplet #1

Gaster dorsally with yellowish brown or orange areas; if with small marks only, then mesosoma entirely orange . . . . . 6

Gaster entirely black or dark brown. Mesosoma laterally at least slightly infuscated . . . . . 9

6

return to couplet #5

Pronotum with reduced microsculpture, strongly shiny at least at sides. Minor coloured orange or yellowish brown except part of gaster infuscated . . . . . 7

Pronotum densely reticulated, matt. Colour variable, often infuscated . . . . . 8

7

return to couplet #6

Minor: dorsal outline of mesosoma very characteristic, with a strongly convex pronotum and almost straight at mesonotum and propodeum. Pronotum only with very short, inconspicuous standing setae. Major: only infuscated on gaster; head shiny; pronotum with short setae. Thailand, Peninsular Malaysia, Borneo . . . . . Camponotus concurrens

Minor: dorsal outline of mesosoma with slightly convex pronotum, mesonotum and propodeum, and a low depression between mesonotum and propodeum. Pronotum with several long, standing setae. Major unknown. Thailand . . . . . Camponotus weiserti

8

return to couplet #6 Minor: gaster black, except tergite 1(–2) with orange-brown mark. Propodeum with slightly convex dorsal outline. Antennomere 7 about twice as long as wide. Philippines . . . . . Camponotus trietericus

Minor: gaster dorsally chiefly pale brown, at most diffusely infuscated, ventrally black. Propodeum with straight dorsal outline. Antennomere 7 almost three times as long as wide. Thailand . . . . . Camponotus sophiae

9

return to couplet #5

Minor with short standing setae on dorsum of head, pronotum, and mesonotum. Major with strongly shiny head. Borneo . . . . . Camponotus syaukanii

Minor with long standing setae on dorsum of head, pronotum, and mesonotum. Major (unknown in C. schulzianus sp.n.) with reticulated microsculpture on head . . . . . 10

10

return to couplet #9

Pronotum with traces of microreticulation. Dorsal outline of mesonotum and propodeum straight. Head vertex weakly domed. Borneo . . . . . Camponotus inquilinus

Pronotum smooth. Dorsal outline of both mesonotum and propodeum slightly convex, more or less separated by a weak depression. Vertex distinctly domed. Thailand . . . . . Camponotus schulzianus