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Pheidole davidsonaeHNS new species
Types Mus. Comp. Zool. Harvard.
Etymology Named after the collector and distinguished insect ecologist Diane W. Davidson.
Diagnosis a member of the diligensHNS group similar in various characters to the species listed in the heading above, and distinguished as follows.
Major: head tricolorous (see Color below); antennal scapes thick and short, their tips touching the lateral margin of the head well short of half the distance from eye to occipital corner; propodeal spine straight, about one-third as long as the basal propodeal face; pronotum peaks at middle to form subangle; rugoreticulum present between eye and antennal fossa; carinulae on head do not extend beyond eye level more than half the Eye Length; in full-face view, concavity of occipital margin very broad.
Minor: occiput narrowed, with nuchal collar; pronotum smooth except for foveolate anterior rim; postpetiole from above bell-shaped. Measurements (mm) Holotype major: HW 1.06, HL 1.06, SL 0.64, EL 0.20, PW 0.56. Paratype minor: HW 0.48, HL 0.60, SL 0.70, EL 0.14, PW 0.34.
Color Major: head tricolorous, with clypeus yellow, head posterior to clypeus light brown, rest of head rich dark reddish brown; mesosoma and waist medium to dark reddish brown; gaster dark brown, tarsi yellow, and other appendages brownish yellow. Minor: body medium brown; tarsi yellow; other appendages light brown.
Range Known only from the type locality.
Figure Upper: holotype, major. Lower: paratype, minor. PERU: Cocha Cashu Research Station, Madre de Dios, 400 m (Diane W. Davidson). Scale bars = 1 mm.
Elevations: collected at 400 m
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