Myrmicinae, Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
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Additional images: worker dorsal view (large); worker petiole, lateral view (large).
Range
Costa Rica: Atlantic slope from sea level to 800m.
Identification
Basal margin of mandible flat, without a notch; face with at most a few short longitudinal rugae between frontal lobes and short rugae extending from mandibular insertions to about level of compound eye, never beyond; rest of face and promesonotum smooth and highly polished; propodeum shiny and polished like promesonotum, but with variably developed transverse rugae on dorsal face; legs black.
Similar species: Stenamma JTL-013.
Natural History
Stenamma expolitum occurs in mature wet forest habitats. It is a specialist inhabitant of clay banks. Colonies are most readily encountered on nearly vertical banks along stream margins, but may also occur along trail edges where they have been cut into hillsides.
Comments
Literature Cited
Page author:
John T. Longino, The Evergreen State College, Olympia WA 98505 USA.longinoj@evergreen.edu
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