Pheidole triumbonata, Wilson, E. O., 2003

Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press : 771

Pheidole triumbonata new species

Types Mus. Comp. Zool. Harvard.

etymology L triumbonata , three knobs, referring to the protuberant frontal lobes and midclypeal carina.

diagnosis Similar to arietans and glyphoderma of Costa Rica in many traits, but distinguished from them and all other Pheidole as follows.

Major: entire dorsal surface of head from level of eyes to occiput covered by transverse carinulae; from eye level to anterior border of head the carinulae are longitudinal; there is no rugoreticulum; frontal lobes and midclypeus bare; frontal lobes and mid-carina of clypeus protrude in side view as angular processes; all of mesosoma carinulate except mesopleuron, which is solely foveolate; postpetiole cone-shaped.

Minor: dorsal surface of head and all of mesosoma foveolate; postpetiolar node greatly depressed; propodeal spines reduced to denticles; head broad, lacking nuchal collar.

Measurements (mm) Holotype major: HW 1.40, HL 1.58, SL 0.74, EL 0.20, PW 0.74. Paratype minor: HW 0.70, HL 0.74, SL 0.66, EL 0.12, PW 0.42.

Color Major and minor: body dark brown; appendages light brown except for tarsi, which are yellow.

Range Known only from the type locality.

Biology Unknown.

Figure Upper: holotype, major. Lower: paratype, minor. MEXICO: 3 km west of Fortin De Las Flores, Veracruz, 1000 m (R. J. and A. B. Hamton). Scale bars = 1 mm.