Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
Minor worker: head length 0.65mm, head width 0.70mm, scape length 0.65mm, Webers length 0.83mm (n=1). Head somewhat flattened behind; promesonotum evenly arched, mesonotal suture absent; humeri weakly projecting as tubercles, each bearing a long seta; propodeal spines short, spiniform; face smooth and shining; mesosoma punctatorugose with varying degrees of smooth shiny spaces on pronotal dorsum and sides; gastral dorsum smooth and shining; dorsal pilosity abundant, long, flexuous; color red brown.
Major worker: head length 1.12mm, head width 1.13mm, scape length 0.63mm (n=1). About anterior half of face with longitudinal, subparallel rugae, gradually fading to foveolate sculpture on posterior half of face; hypostomal margin curved, with small rounded median tooth and pair of stout, blunt teeth about one half distance to recessed teeth flanking mandible bases; dorsal pilosity abundant; pilosity on sides of head abundant, projecting from sides.
Costa Rica: Cordillera Volcanica Central, Braulio Carrillo National Park, Barva transect, 1100m.
This species is only known from one locality but it is relatively abundant at that locality. The Project ALAS survey at the 1070m site on the Barva transect yielded numerous collections in Malaise traps, pan traps on the ground, and Winkler samples of sifted leaf litter from the forest floor.
This minor worker of this species is superficially similar to erratilis. The propodeal spines of erratilis are triangular; those of this species are more spiniform. It is also quite similar to umphreyi, a species that occurs at higher elevations on the Barva transect.
John T. Longino, The Evergreen State College, Olympia WA 98505 USA. firstname.lastname@example.org
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