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Types Mus. Comp. Zool. Harvard.
Diagnosis Close to arctosHNS, but distinguishable from it (and other members of the scrobiferaHNS group) by the pattern of sculpturing and details of body form in the major, and in the unusually long, needle-like propodeal spines and piligerous cornicles of the humeri, also as shown.
Measurements (mm) Holotype major: HW 1.24, HL 1.54, SL 0.58, EL 0.16, PW 0.72. Paratype minor: HW 0.58, HL 0.58, SL 0.58, EL 0.12, PW 0.38. color Major: body and appendages medium reddish brown; gaster dark brown. Minor: light brown.
Range Known only from the type locality.
Biology The nest of the type colony was in black clayey soil in the middle of a path through degraded lowland rainforest. The single entrance hole was surrounded by a narrow ring of excavated earth. Major workers were scarce (E. O. Wilson).
figure Upper: holotype, major. Lower: paratype, minor. MEXICO: Pueblo Nuevo, near Tetzonapa (E. O. Wilson). Scale bars = 1 mm.