Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
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Identification
Minor worker: head length 0.61mm, head width 0.58mm, scape length 0.59mm, Webers length 0.77mm (n=1). Head rounded behind; promesonotum evenly arched, mesonotal suture absent; humeri projecting as tubercles, each bearing a long seta; propodeal spines short; face, pronotum, and gaster largely smooth and shining; katepisternum, anepisternum, and propodeum foveolate; dorsal pilosity abundant, long, flexuous; color red brown.
Major worker: head length 1.11mm, head width 1.08mm, scape length 0.61mm (n=1). About anterior half of face with longitudinal, subparallel rugae, those between frontal carinae extending more posteriorly in some specimens, nearly absent in others, rest of face smooth and shining; hypostomal margin flat, with small, rounded, inconspicuous median tooth, and pair of stout, sharp teeth about one third distance to recessed teeth flanking mandible bases; dorsal pilosity abundant; pilosity on sides of head variable, abundant and suberect to short, subdecumbent, and somewhat inconspicuous.
Range
Costa Rica: widespread in wet forest areas, to 2000m in Braulio Carrillo, to 800m in Penas Blancas.
Natural History
This species occurs in wet forest leaf litter and nests in dead wood or dead stems.
Selected Records
La Selva: nest in Lecythis pod on ground.
Braulio Carrillo, 1100-2000m: 4 Winkler samples.
Braulio Carrillo 600m: 1 collection (no additional data).
Penas Blancas: 1 Winkler sample.
Volcan Arenal Observatory Lodge: nest in dead wood on ground in forested ravine.
Osa region: 1 Winkler sample.
Osa region: nesting inside a live Costus inflorescence, in necrotic cavities beneath the bracts.
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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