Pheidole alacris

This species is only known from type specimens. Nothing is known about its biology.

Identification
See the description in the nomenclature section.

Distribution
Only known from the type locality.

Distribution based on Regional Taxon Lists
Neotropical Region: Argentina.

Worker
Minor

Nomenclature

 *  alacris. Pheidole flavens st. alacris Santschi, 1923d: 61 (s.w.) ARGENTINA. Raised to species and senior synonym of mediorubra: Wilson, 2003: 366.
 * mediorubra. Pheidole flavens var. mediorubra Santschi, 1933e: 107 (s.w.) ARGENTINA. Junior synonym of alacris: Wilson, 2003: 366.

Description
From Wilson (2003): Similar in various traits to Pheidole atticola, Pheidole dinophila, Pheidole hazenae, Pheidole lucaris and Pheidole ulothrix, distinguished as follows.

Major: brown, with yellow legs; entire dorsum of head except for frontal triangle and midclypeus carinulate; anterior third of pronotal dorsum covered by broken transverse carinulae; all of dorsal surface of head and all of mesosoma foveolate; in side view mesonotal convexity present, although very low; postpetiole seen from above elliptical.

Minor: eye set well forward on head; propodeal spine equilaterally triangular; all of head and mesosoma foveolate; occiput narrowed somewhat, its margin straight; nuchal collar absent.

MEASUREMENTS (mm) Lectotype major: HW 0.94, HL 0.96, SL 0.52, EL 0.12, PW 0.50. Paralectotype minor: HW 0.42, HL 0.48, SL 0.42, EL 0.08, PW 0.28.

COLOR Major: body and mandibles medium brown; other appendages dark yellow.

Minor: concolorous light brown.



'''Figure. Upper: lectotype, major. Lower: paralectotype, minor.'''

Type Material
ARGENTINA: Estación Sosa, Entre Rios. - as reported in Wilson (2003)

Etymology
L alacris, active, eager.

References based on Global Ant Biodiversity Informatics

 * Cuezzo, F. 1998. Formicidae. Chapter 42 in Morrone J.J., and S. Coscaron (dirs) Biodiversidad de artropodos argentinos: una perspectiva biotaxonomica Ediciones Sur, La Plata. Pages 452-462.
 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * Santschi F. 1933. Fourmis de la République Argentine en particulier du territoire de Misiones. Anales de la Sociedad Cientifica Argentina. 116: 105-124.
 * Vittar, F. 2008. Hormigas (Hymenoptera: Formicidae) de la Mesopotamia Argentina. INSUGEO Miscelania 17(2):447-466