Pheidole tepicana

In the Santa Cruz Mountains of Arizona, Stefan Cover (unpublished notes) found a colony of tepicana in an open area with opuntia and dwarf acacia surrounded by blue oak, nesting under a stone in the sun; the nest contained a cache of seeds. The species is notably flexible in its choices of nest site. Near Tucson, Arizona, I observed a colony in an open grassy area, spread out beneath multiple stones. In western Texas, Moody and Francke (1982) found numerous colonies, nesting mostly under stones and in open soil; one colony each was also beneath a log, a piece of metal, and a grass clump respectively. And finally, at Cuernavaca, Wheeler (1901b) observed that colonies were common beneath pats of half-dried cow dung. (Wilson 2003)

Identification
See the description in the nomenclature section.

Distribution
Texas, Arizona southward to at least Jalisco, Mexico: often locally abundant. (Wilson 2003)

This taxon was described from Mexico. It is also found in the United States.

Description
From Wilson (2003): DIAGNOSIS A member of the “pilifera complex” of the larger pilifera group; for a characterization of the complex, see under Pheidole pilifera.

P. tepicana is distinguished within the complex as follows. Trimorphic, with major, supermajor, and minor castes.

Major: posterior half of dorsum of head except for occiput smooth and shiny; pronotum low and smoothly convex; mesonotal convexity very low; postpetiole from above diamond-shaped. Supermajor: posterior third of head covered by a mixture of rugulae and rugoreticula; rugoreticulum present between eye and antennal fossa.

Minor: propodeal spines reduced to denticles; head almost entirely smooth and shiny.

MEASUREMENTS (mm) Major (Austin, Texas): HW 1.12, HL 1.34, SL 0.62, EL 0.12, PW 0.54. Supermajor (Guadalajara, Mexico): HW 1.62, HL 2.00, SL 0.74, EL 0.14, PW 0.74. Minor (Austin, Texas): HW 0.52, HL 0.56, SL 0.52, EL 0.12, PW 0.32.

COLOR Major: reddish yellow.

Supermajor: light reddish brown.

Minor: brownish yellow.



'''Figure. Upper: major (plus partial frontal head view of a supermajor). Lower: minor. TEXAS: major and minor from Austin (syntypes of the synonymy kingi subsp. instabilis Emery); supermajor from Guadalajara, Jalisco, Mexico. Scale bars = 1 mm.'''

Type Material
and  - as reported in Wilson (2003)

Type Locality Information
Mexico Tepic, Nayarit, collected by Eisen and Vaslit. (Wilson 2003)

Etymology
Name based on type locality. (Wilson 2003)

Additional References
[[Media:Andre 1898.pdf|André, E. 1898. Description de deux nouvelles fourmis du Mexique (Hymén.). Bull. Soc. Entomol. Fr. 1898: 244-247 PDF]]

Moody, J. V., Francke, O. F. 1982. The ants (Hymenoptera, Formicidae) of western Texas, Part 1: Subfamily Myrmicinae. Grad. Stud. Tex. Tech Univ. 27: 1–80.

Pergande, T. 1896. Mexican Formicidae. Proc. Calif. Acad. Sci. (2)5: 858–896.

Wheeler, W. M. 1901. Notices biologiques sur les fourmis Mexicaines. Ann. Soc. Entomol. Belg. 45: 199–205.

Text and images from this publication used by permission of the author.