Key to Acanthomrymrex

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This worker key is based on: Moffett, M.W. 1986. Revision of the myrmicine genus Acanthomyrmex. Bulletin of the Museum of Comparative Zoology. 151:55-89. [15.viii.1986.] PDF

There is a key to minors and majors.

This key is dated, as the genus has almost doubled in size since its publication. Pecies missing from the key as of May, 2020: Acanthomyrmex glabfemoralis, Acanthomyrmex humilis, Acanthomyrmex malikuli, Acanthomyrmex minus, Acanthomyrmex mizunoi, Acanthomyrmex padanensis, Acanthomyrmex sulawesiensis and Acanthomyrmex thailandensis.

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Minor Workers

The minor workers of Acanthomyrmex dusun and Acanthomyrmex foveolatus are unknown.

1

  • Head convex across posterior margin, with at most a feeble medial concavity in full-face view . . . . . 2
  • Head distinctly concave across posterior margin . . . . . 4

2

return to couplet #1

3

return to couplet #2

Acanthomyrmex ferox casent0178572 head 1.jpg
Acanthomyrmex ferox casent0178572 profile 1.jpg
Acanthomyrmex laevis casent0281792 h 1 high.jpg
Acanthomyrmex laevis casent0281792 p 1 high.jpg

4

return to couplet #1

  • Head deeply concave across posterior margin . . . . . 5
  • Head feebly concave across posterior margin in full face view . . . . . 7

5

return to couplet #4

Acanthomyrmex basispinosus casent0178575 head 1.jpg
Acanthomyrmex basispinosus casent0178575 profile 1.jpg

6

return to couplet #5

Acanthomyrmex-luciolaeHUMCZ001H4.jpg
Acanthomyrmex-luciolaeHUMCZ001L4.jpg
Acanthomyrmex concavus casent0101061 head 1.jpg
Acanthomyrmex concavus casent0101061 profile 1.jpg

7

return to couplet #4

  • Propodeal spines somewhat laterally compressed, appearing blade-like in lateral view; from Taiwan (Lanyu Island) . . . . . Acanthomyrmex crassispinus
Acanthomyrmex crassispinus casent0101994 head 1.jpg
Acanthomyrmex crassispinus casent0101994 profile 1.jpg
  • Propodeal spines, cylindrical, not at all blade-like . . . . . 8

8

return to couplet #7

  • Well-developed small projecting lobes immediately on each side of medial hair on anterior margin of clypeus; funicular scrobes present . . . . . Acanthomyrmex mindanao
Acanthomyrmex mindanao.jpg
Acanthomyrmrex mindanao-HUMCZ005MinorL.jpg
  • Medial clypeal lobes poorly developed; scrobes for scapes present, but these not bent down posteriorly to form funicular scrobes above eyes . . . . . Acanthomyrmex careoscrobis
Acanthomyrmex careoscrobis casent0901703 h 1 high.jpg
Acanthomyrmex careoscrobis casent0901703 p 1 high.jpg

Major Workers

The major workers of Acanthomyrmex careoscrobis, Acanthomyrmex concavus, and Acanthomyrmex laevis are unknown.

1MA

  • Posterior margin of head conspicuously bilobed when head viewed in full-face (luciolae group) . . . . . 2MA
  • Posterior margin of head not strongly bilobed, at most slightly emarginate mesad (notabilis group) . . . . . 6MA

2MA

return to couplet #1

  • Propodeal spines somewhat laterally compressed, appearing blade-like in lateral view; from Taiwan (Lanyu Island) . . . . . Acanthomyrmex crassispinus
Acanthomyrmex crassispinus F7ab.jpg
  • Propodeal spines, cylindrical, not at all blade-like . . . . . 3MA

3MA

return to couplet #2

Acanthomyrmex basispinosus casent0178574 head 1.jpg
Acanthomyrmex basispinosus casent0178574 profile 1.jpg

4MA

return to couplet #3

Acanthomyrmex ferox casent0178570 head 1.jpg
Acanthomyrmex ferox casent0178570 profile 1.jpg

5MA

return to couplet #4

Acanthomyrmex dusun casent0281793 h 1 high.jpg
Acanthomyrmex dusun casent0281793 p 1 high.jpg

6MA

return to couplet #1

Acanthomyrmex notabilis casent0281789 h 1 high.jpg
Acanthomyrmex notabilis casent0281789 p 1 high.jpg
  • Postpetiole about as wide as it is long in dorsal view . . . . . 7MA

7MA

return to couplet #6

  • Dorsum of head with tiny, shallow foveae except for large foveae bordering antennal scrobes . . . . . Acanthomyrmex foveolatus
MCZ-ENT00033368 Acanthomyrmex foveolatus hef.jpg
MCZ-ENT00033368 Acanthomyrmex foveolatus hal.jpg
Acanthomyrmex mindanao HUMCZ001H.jpg
Acanthomyrmex mindanao-HUMCZ003L.jpg