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Types Mus. Comp. Zool. Harvard.
diagnosis A medium-sized dark member of the tristisHNS group, very close to and possibly synonymous with corniculaHNS, also somewhat similar to ambiguaHNS, amataHNS, feraHNS, germainiHNS, peruvianaHNS, rogeriHNS, rutilanaHNS, schwarzmaieriHNS, superbaHNS, and vomerHNS, differing as follows.
Major: medium to dark reddish brown; a low angular process protrudes from center of clypeus in side view; mid-dorsal profile of pronotum in side view subangular; petiolar node tapers to a blunt point in side view; postpetiolar node from above roughly trapezoidal; carinulae originating on frontal lobes curve outward to the rear.
Minor: petiolar and postpetiolar nodes very low; humerus in dorsal-oblique view with small denticle; propodeal spines reduced to denticles; nuchal collar present.
Measurements (mm) Holotype major: HW 1.46, HL 1.66, SL 0.80, EL 0.16, PW 0.64. Paratype minor: HW 0.56, HL 0.68, SL 0.82, EL 0.10, PW 0.38.
color Major: head and mesosoma dark reddish brown, waist medium reddish brown, gaster light to medium brown, legs yellowish brown.
Minor: body concolorous plain brown; tarsi yellow; rest of appendages yellowish brown.
Range Known from the type locality in Costa Rica and from Kukra Hill, Nicaragua.
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: 66 times found in mature wet forest, 58 times found in tropical moist forest, 32 times found in tropical rainforest, 20 times found in tropical wet forest, 13 times found in 2º lowland rainforest, 12 times found in mature rainforest, edge of forest near pasture and agricultural land, steep rocky terrain, 2 times found in SSA 3400, 3 times found in 2nd growth forest, 3 times found in STR, 6 times found in montane wet forest, near edge of pasture, ...
Found most commonly in these microhabitats: 116 times at bait, 101 times ex sifted leaf litter, 18 times Primary forest, 7 times Primary, 3 times bajo de M/28, 3 times Hojarasca, 3 times At baits on ground; primary forest along CES; part of project for OTS managed ec, Pheidole; CES, nest under bark, rotten log in primary forest. times 3326, 1 times nest in soil, 1 times All ants from Louisa Stark (OTS 89-1 student) study; litter and ground-nesting a, 1 times STR, ...
Collected most commonly using these methods: 146 times baiting, 86 times miniWinkler, 25 times Lure/Bait, 12 times MaxiWinkler, 6 times Winkler, 8 times Pitfall, 3 times search, 4 times flight intercept trap, 3 times bait, 5 times Malaise, 1 times Unknown, ...
Elevations: collected from 30 - 760 meters, 222 meters average