Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
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Identification
Minor worker: head length 0.53mm, head width 0.48mm, scape length 0.41mm, Webers length 0.60mm (n=1). Head flattened behind; mesonotal suture absent; humeri barely produced as small tubercles; propodeal spines short; face smooth and shining; pronotum smooth and shining; katepisternum with center smooth and shining, margin foveolate; ventral half of side of propodeum smooth and shining, dorsal half and dorsum foveolate; gaster smooth and shining; dorsal pilosity abundant, moderately long, flexuous; color dark brown.
Major worker: head length 0.90mm, head width 0.82mm, scape length 0.46mm (n=1). Face dark brown; anterior half of face with subparallel, longitudinal rugae; rest of face smooth and shining; clypeus smooth; antennal scrobes present in the form of broad, shallow depressions beneath apices of scapes; scrobes smooth and shiny; hypostomal margin straight, with no median tooth, and pair of small teeth about half distance to recessed teeth flanking mandible bases (Figure); dorsal pilosity abundant; head with abundant, short setae projecting from sides of head in face view.
Range
Costa Rica (Atlantic lowlands).
Natural History
Selected Records
La Selva: mature wet forest; under loose bark of large, leaning, dead Cecropia trunk; bark intact but easily sloughing in big sheets.
Page authors:
John T. Longino, The Evergreen State College, Olympia WA 98505 USA. longinoj@evergreen.edu
Stefan Cover, Museum of Comparative Zoology, Harvard University, Cambridge MA 02138 USA. scover@oeb.harvard.edu
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