Key to Camponotus Myrmopytia workers

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This worker key is based on: Rasoamanana, N., Csősz, S., Fisher, B.L. 2017. Taxonomic revision of imitating carpenter ants, Camponotus subgenus Myrmopytia (Hymenoptera, Formicidae) of Madagascar, using morphometry and qualitative traits. ZooKeys 681: 119–152 (DOI 10.3897/zookeys.681.13187).

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1

  • Minor: in full-face view, the posterior region of the head elongated into a short, broad neck (Fig. 4A); Post ocular distance shorter: PoOC/CL <0.304. Major: head wedge-shaped (Fig. 5A); head wider: CWb/CL >0.718. Minor and major: clypeus with a broad rectangular projection; erect to suberect brown pilosity present on entire dorsum; head and mesosoma red, gaster black . . . . . Camponotus imitator
Figure 4.
Figure 5.
  • Minor: in full-face view, the posterior region of the head elongated into long, narrow neck (Fig. 4B); Post ocular distance longer: PoOC/CL >0.404. Major: head more rectangular or tapering to rear (Fig. 5B); head narrower: CWb/ CL <0.717. Minor and major: entire anterior clypeal margin produced into an obtuse angle; appressed to subdecumbent white hairs present on its entire dorsum; body uniformly dark brown to black . . . . . 2

2

return to couplet #1

  • Minor and major: in profile, petiole relatively low and nodiform, with the anterodorsal angle higher than the petiolar spiracle, NOH/CS <0.146 (Fig. 6A); anterior tentorial pit slightly impressed so that the posterior portion of clypeus protrudes weakly in lateral view (Fig. 7A). Major: head narrowed posteriorly, dorsal outline of mesonotum distinctly constricted longitudinally, propodeum protuberant . . . . . Camponotus longicollis
Figure 6.
Figure 7.
  • Minor and major: in profile, petiole conical, with the anterodorsal angle on the same level as or below the petiolar spiracle, NOH/CS >0.160 (Fig. 6B); anterior tentorial pit distinctly impressed so that posterior portion of clypeus protrudes strongly in lateral view (Fig. 7B). Major: head of major worker more rectangular, dorsal outline of mesosoma forms a smooth curve separated by weak promesonotal suture and mesopropodeal impression . . . . . 3

3

return to couplet #2

  • Minor worker: in lateral view, petiolar apex forms an acute to a right angle, dorsal face of petiole flattened with distinct lateral edge, PEW/CS >0.169 (Fig. 8A); propodeum hemispherical; integument of mesonotum and propodeum glabrous to finely sculptured (Fig. 8A); antennal funiculus, basitarsi and tarsi yellowish to light brown . . . . . Camponotus karaha
Figure 8.
  • Minor worker: in lateral view, petiolar apex forms a blunt spine, dorsal face of petiole slightly convex without distinct edge, PEW/CS <0.156 (Fig. 8B); propodeum more rectangular, with a raised anterodorsal transverse carina; integument of mesonotum and propodeum strongly sculptured (Fig. 8B); antennal funiculus, basitarsi and tarsi brown . . . . . Camponotus jodina