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Costa Rica (Atlantic lowlands).
The species occurs in mature wet forest to 600m. It nests in the low arboreal zone, within a few meters of the ground. It does not appear to forage on the ground during the day, since it has not been collected at baits and only once in a Winkler sample.
Pheidole prostrataHNS new species
Types Mus. Comp. Zool. Harvard.
Etymology L prostrataHNS, low, flattened, alluding to the low mesonotal convexity and postpetiolar node of the minor in side view.
Diagnosis Major: varicolored, with bicolorous head; dorsolateral areas of head anterior to the occiput weakly rugoreticulate, with the dorsal head surface between the rugoreticular patches longitudinally carinulate; dorsal pilosity of body dense, long, and erect; propodeal spine long and thin.
Minor: mesonotal convexity and postpetiolar node in side view flattened; dorsal pilosity of head and mesosoma sparse, long, and erect.
Similar to aculiferaHNS (in the fallaxHNS group), whose major has a rugoreticulum mesad to the eyes but not just anterior to occiput, with the posterior half of the head foveolate only, and neither carinulate nor foveolate as in prostrataHNS. The propodeal spiracle is very small in the major compared to that of aculiferaHNS. See also the less similar borucaHNS, variegataHNS, and violaceaHNS.
Measurements (mm) Holotype major: HW 1.12, HL 1.12, SL 0.80, EL 0.16, PW 0.48. Paratype minor: HW 0.48, HL 0.64, SL 0.82, EL 0.14, PW 0.32.
Color Major: head bicolorous, with clypeus and capsule posterior to anterior margins of eyes light brown, and rest of capsule brownish yellow; gaster and waist light brown; mesosoma brownish yellow; legs yellow.
Minor: head posterior to eyes, as well as postpetiole and gaster, light brown; mesosoma, anterior margin of head capsule, and petiole brownish yellow; appendages yellow.
Range Atlantic lowlands of Costa Rica (J. T. Longino 1997).
biology According to Longino (1997), prostrataHNS nests in the low arboreal zone, within a few meters of the ground, in mature wet forest. It apparently does not forage onto the ground.
Figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: La Selva Biological Station, near Puerto Viejo, Heredia (Leeanne E. Tennant-Alonso). Scale bars = 1 mm.
Found most commonly in these habitats: 17 times found in montane wet forest, 7 times found in mature wet forest, 5 times found in wet forest, 1 times found in SHO 650 m., 1 times found in CEN, 1 times found in second growth forest, 2 times found in La Selva, 2 times found in lowland rainforest, 1 times found in clearing in wet forest, 1 times found in Entre LOC y SAT, ...
Found most commonly in these microhabitats: 8 times ex sifted leaf litter, 4 times Hojarasca, 1 times wet forest, 1 times Nest in vertical dead stick over swamp., 1 times nest in dead stick on ground [seeds in nest], 1 times on epiphytes, 2 times bajo de M/13, 1 times Wet forest. Ex sifted leaf litter., 1 times strays, 1 times Malaise trap, 1 times ex suspended litter, ...
Collected most commonly using these methods: 16 times Malaise, 4 times Search, 7 times miniWinkler, 3 times Winkler, 6 times Fogging, 4 times Mini Winkler, 3 times flight intercept trap, 1 times Foso, 1 times Berlese, 1 times Foggin.
Elevations: collected from 50 - 820 meters, 293 meters average