Stenamma JTL-010 Longino ms

Myrmicinae, Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view

Additional images: worker clypeus (large, small).


Costa Rica: Atlantic slope wet forest, sea level to 1600m, Cordillera Volcanica Central and Cordillera de Tilaran.


Basal margin of mandible flat, without a notch; face with irregular rugae anteriorly, smooth and shiny posteriorly; mesosoma coarsely and irregularly rugose; propodeum with well-developed angular tubercles at juncture of dorsal and posterior faces; side of petiolar peduncle and lower side of petiolar node punctate; metapleural lobe rounded; WL greater than 1mm.

Variation: the face sculpture varies in strength. At one extreme there is sparse reticulate rugose sculpture between frontal lobes and compound eyes and the rest of the face is completely smooth and shining. At the other extreme there are sparse irregular rugae spread across face and at margin of vertex.

Similar species: Stenamma JTL-015.

Natural History

This species inhabits mature wet forest from near sea level to 1600m elevation cloud forest. It is known from about 15 Winkler samples of sifted leaf litter from the forest floor. Collections are rare at La Selva Biological Station and more common above 500m. Nothing is known of its nesting or foraging habits.


Literature Cited

Page author:

John T. Longino, The Evergreen State College, Olympia WA 98505

Date of this version: 29 September 2004.
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