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Costa Rica: Monteverde.
Inhabits cloud forest; known from three Winkler samples from various sites around Monteverde and one bait from a pasture/forest margin. Ryan Burtoft, a student from the Evergreen State College, was carrying out the baiting program.
The minor workers of this species have been collected various times, and appear to be a yellow version of Pheidole monteverdensis. The holotype is a major worker from one of Ryan Burtoft's baits.
Types Mus. Comp. Zool. Harvard.Gr hizema, sinking, and ops, eye.
Diagnosis A small species sharing some traits, especially a moderately prominent mesonotal convexity, with kunaHNS, miconHNS, tayronaHNS, and tenebraHNS of Mexico, Central America, and Colombia, and less so with brevisetaHNS, bruchellaHNS, and lignicolaHNS of Argentina and southern Brazil, but differing in details of sculpturing as shown, and especially in the eye of the major, which is placed farther forward on the head and has a concave posterior border.
Measurements (mm) Holotype major: HW 0.70, HL 0.76, SL 0.44, EL 0.14, PW 0.44. Paratype minor: HW 0.50, HL 0.54, SL 0.42, EL 0.10, PW 0.32.
Color Major: waist and gaster light brown; rest of body and appendages reddish yellow ("orange"), with tarsi medium yellow. Minor: reddish yellow ("orange").
range Mountain forests of west-central Costa Rica, 1300-1600 m (Longino 1997).
Biology Specimens, some at baits, were recovered from leaf litter in montane rainforest.
figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: 2.5 km northwest of Santa Elena, Puntarenas Province, 10AÃ‚Â°20TSf 84AÃ‚Â°50'W, 1500 m (R. Burtoft). Scale bars = 1 mm.
Found most commonly in these habitats: 13 times found in roadcut in cloud forest, 7 times found in 2nd growth cloud forest, 6 times found in mature moist forest, 3 times found in wet forest, 1 times found in 2° moist forest, 4 times found in cloud forest, 4 times found in road edge in 2nd growth veg., 3 times found in evergreen forest, 3 times found in pasture fencerow edge, 1 times found in stream edge in moist forest, ...
Found most commonly in these microhabitats: 23 times at bait, 6 times ex sifted leaf litter, 8 times at ground bait, 3 times nest in soil, 2 times foragers on ground, 2 times nest in clay soil, 1 times nest in clay bank, 1 times ex sifted litter, 1 times ex sifted leaf litter on ground, 1 times ex canopy tree.
Collected most commonly using these methods: 24 times bait, 9 times search, 8 times Winkler, 1 times Baiting on ground, 5 times baiting, 1 times fogging.
Elevations: collected from 1230 - 1740 meters, 1458 meters average
Type specimens: Holotype Pheidole hizemops: jtlc000010009; Paratype Pheidole hizemops: inbiocri001281291, inbiocri001281774, inbiocri001282012, inbiocri001282139, inbiocri001283051, inbiocri001283052, inbiocri001283053, inbiocri001283054, inbiocri001283055