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Southern Mexico to Peru, across northern South America to Guyana.
This species occurs in wet forest habitats, from sea level to about 1000 m elevation. Minor workers are collected at baits and in litter samples. Nests are in clay soil.
Stefan Cover collected a colony in Peru. The colony was collected in clay soil at the base of a tree in terra firme rainforest. The nest was 12 cm deep and contained a single queen, five majors, and about 200 minors.
Longino collected two colonies in Nicaragua:
JTL7503, nest in clay bank in dry stream channel; more than 10 separate small chambers distributed irregularly in soil behind surface, connected by tunnels; each chamber 1-2 cm; chambers contained brood, minors, majors, adult males; I never saw one of the phragmotic soldiers using its head to block entrances.
JTL7511: incipient nest in exposed vertical clay soil of trail edge; entrance a natural crack in soil with small amount of excavated soil around entrance; nest a single shallow chamber with queen.
COI records on BOLD show a clade of three clusters: 1 from Costa Rica northward, 1 from Panama, and 1 from Ecuador.
Types Nat. Mus. Nat. Hist. U.S.
Diagnosis A typical member of the lamiaHNS group: the major has a phragmotic head, with the anterior portion incorporating the clypeus and mandibles flattened (truncated), and deep antennal scrobes. This species is easily distinguished from the other members of the lamiaHNS group ( lamiaHNS, pelorHNS, trunculaHNS) by the shorter head of the major and the pattern of carinulae on its head: limited to dense longitudinal rows on the frontal lobes and frontal triangle and transverse rows on the lateral wings of the clypeus. Other differences in body form and sculpturing are as illustrated. The queen is also phragmotic.
Measurements (mm) Major (Rio Porce, Colombia): HW 1.08, HL 1.20, SL 0.54, EL 0.14, PW 0.60. Minor (Rio Porce, Colombia): HW 0.52, HL 0.54, SL 0.52, EL 0.06, PW 0.32.
color Major: mostly light reddish brown; appendages, the truncated front of the head, and a narrow horizontal strip posterior to the eyes dark yellow.
Minor: body and scapes medium reddish brown, other appendages yellowish brown.
Range Known only from series collected in Rondonia, Brazil, Rio Porce, Colombia, and Cuzco Amazonico, Madre de Dios, Peru.
biology The Peruvian colony was collected in clay soil at the base of a tree in terra firme rainforest. The nest was 12 cm deep and contained a single queen, five majors, and about 200 minors. The majors and minors in this series are a nearly uniform dark yellow to amber color.
Figure Upper: major. Lower: minor. COLOMBIA: Rio Porce, near Medellin, 1020 m (Neal A. Weber). (Type locality: RondoniaMamore railway track, Km 306, Rondonia, Brazil.) Scale bars = 1 mm.
Found most commonly in these habitats: 47 times found in mature wet forest, 48 times found in 2º wet forest, 34 times found in tropical wet forest, 30 times found in tropical rainforest, 8 times found in wet forest, 20 times found in tropical moist forest, 17 times found in ridgetop cloud forest, isolated peak with oak trees, 17 times found in lowland rainforest, 15 times found in 2º lowland rainforest, 14 times found in montane wet forest, ...
Found most commonly in these microhabitats: 235 times ex sifted leaf litter, 68 times at bait, 2 times leaf litter, 1 times nest in clay soil, 1 times nest in clay bank, 1 times Hojarasca, 1 times ex sifted litter, rotten wood, 1 times sifted litter.
Collected most commonly using these methods: 177 times miniWinkler, 67 times Baiting, 44 times MaxiWinkler, 12 times Winkler, 8 times Berlese, 2 times search, 1 times bait, 1 times Night MiniWinkler.
Elevations: collected from 50 - 1200 meters, 362 meters average