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Southern Mexico to Costa Rica
This species occurs in lowland wet forest. Most collections are from sifted litter and at baits. The species is sporadic, but when it does occur it is often in large numbers, sometimes hundreds of workers in a Winkler sample. This suggests that colonies are large. Little is known of the nesting habits.
Types Mus. Comp. Zool. Harvard.
Diagnosis A very small, yellow member of the flavensHNS group whose major is marked by its strongly curved propodeal spine (as though the tip had "melted" backward); long scapes, which reach the occipital comers; all of the sculpturing on the anterior half of the head consisting of longitudinal carinulae, with the posterior half smooth and shiny; and pronotal humerus in dorsal-oblique view rounded. Similar to onyxHNS, but in the major, citrinaHNS has a more curved propodeal spine, far less carinulation on the dorsal head surface, and longer scapes, among other differences. See also the less similar grexHNS and humidaHNS.
Measurements (mm) Holotype major: HW 0.66, HL 0.70, SL 0.54, EL 0.06, PW 0.38.
Paratype minor: HW 0.46, HL 0.50, SL 0.54, EL 0.10, PW 0.28.
Color Major and minor: concolorous yellow.
Range Atlantic lowlands of Costa Rica (Longino 1997).
Biology Collected from leaf litter in wet forest.
figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: La Selva Biological Station, near Puerto Viejo (M. Byrne). Scale bars = 1 mm.
Found most commonly in these habitats: 124 times found in mature wet forest, 61 times found in montane wet forest, 47 times found in tropical wet forest, 24 times found in tropical rainforest, 3 times found in SSA, 15 times found in tropical rainforest, with some big trees, probably a mix of primary and secondary forest, 1 times found in CES, 2 times found in LOC, 11 times found in tropical rainforest, with big trees, probably primary, 7 times found in wet forest, ...
Found most commonly in these microhabitats: 247 times ex sifted leaf litter, 62 times Hojarasca, 14 times at bait, 2 times Hojarasca., 1 times ex sifted leaf litter and rotten wood, 1 times Bosque Secundario, Suelo, 1 times Bosque Primario, Suelo, 2 times sifted litter, 1 times Del cruce de Cascante hacia el Ceibo, 1 times Cerca de; Cañon del rio Peje hacia Cascante, 1 times bajo de M/05, ...
Collected most commonly using these methods: 202 times miniWinkler, 28 times Winkler, 51 times Mini Winkler, 14 times Berlese, 34 times MaxiWinkler, 14 times Baiting, 2 times flight intercept trap, 2 times search.
Elevations: collected from 50 - 1500 meters, 323 meters average