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Costa Rica, Panama. Costa Rica: Atlantic lowlands.
Arboreal in lowland wet forest; nesting in dead branches.
Types Mus. Comp. Zool. Harvard.
Major: yellow; occiput, genae, and promesonotal dorsum rugoreticulate; large "sharkfin" protrusion on humerus extends beyond the
boundaries of the rest of the pronotum when viewed from above; dorsum of postpetiolar node carinulate.
Minor: large "sharkfin" angle protrudes from humerus; all of body except gaster foveolate and opaque; very thin nuchal collar
Measurements (mm) Holotype major: HW 1.22, HL 1.18, SL 0.64, EL 0.14, PW 0.62. Paratype minor: HW 0.60, HL 0.66, SL 0.66, EL 0.10, PW 0.42. color Major: concolorous dark yellow. Minor: concolorous medium yellow.
range Known only from the type locality.
biology "From large thorns hollowed out on living tree" (A. E. Emerson, collection note 13 April 1935).
figure Upper: holotype, major. Lower: paratype, minor. PANAMA: Barro Colorado Island (Alfred E. Emerson). Scale bars = 1 mm.
Found most commonly in these habitats: 1 times found in primary rainforest.
Elevations: collected at 50 m