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Types Mus. Comp. Zool. Harvard.
Major: head elongate; in side view, frontal lobe extending vertically off the dorsal surface of the head as a spine-like projection; promesonotum forming a large, bulbous, smoothly semicircular outline; petiolar spine well-developed and vertical; posterior half of the head capsule and almost all of the body smooth and shiny.
Minor: occiput broad and concave, lacking nuchal collar; promesonotal profile forming a prominent, smooth semicircle; except for the foveolate mesopleuron and lower side of the petiole, the body is completely smooth and shiny.
Measurements (mm) Holotype major: HW 0.92, HL 1.14, SL 0.42, EL 0.12, PW 0.46.
Paratype minor: HW 0.46, HL 0.50, SL 0.42, EL 0.06, PW 0.30.
Color Major: concolorous clear medium yellow.
Minor: concolorous clear light yellow.
range Known from the type locality and from Cuiaba, Mato Grosso, Brazil (J. C. Trager).
Figure Upper: holotype, major. Lower: paratype, minor. GUYANA: Kartabo (William M. Wheeler). Scale bars = 1 mm.
Found most commonly in these habitats: 97 times found in 2º lowland rainforest, 54 times found in mature wet forest, 27 times found in tropical wet forest, 34 times found in tropical rainforest, 2 times found in 2nd growth wet forest, 1 times found in riparian dry forest, Agricultural Land times found in Disturbed, 2 times found in garden, 1 times found in Sendero Tres Ríos, 2 times found in disturbed tropical wet forest.
Found most commonly in these microhabitats: 104 times at bait, 109 times ex sifted leaf litter, 1 times nest in clay soil, 2 times at bait nr stream edge, 1 times under rock, 1 times ex sifted litter, 1 times Hojarasca.
Collected most commonly using these methods: 111 times baiting, 91 times miniWinkler, 18 times MaxiWinkler, 2 times search, 2 times Winkler.
Elevations: collected from 30 - 800 meters, 165 meters average