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Types Mus. Comp. Zool. Harvard.
Diagnosis Tentatively placed in the tristisHNS group because of its larger size, macracanthaHNS is similar to cataphractaHNS of the punctatissimaHNS group, differing in the minor caste as follows: much larger; occiput in full face strongly convex instead of concave; pilosity denser and longer; first gastral tergite mostly shagreened.
measurements (mm) Holotype minor: HW 0.72, HL 0.76, SL 0.78, EL 0.12, PW 0.46.
Color Concolorous yellow.
range Known only from the type locality.
Figure Holotype, minor. PANAMA: Guipe (J. Zetek). Scale bar = 1 mm.
Type specimens: paratype Pheidole macracantha: jtlc000016443