Pheidole traini

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Pheidole traini
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. traini
Binomial name
Pheidole traini
Wilson, 2003

Pheidole traini mekou221454 p 1 high.jpg

According to Longino (1997), , traini occurs in Costa Rica in mature wet forests. Its nesting and feeding habits are unknown. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


In addition to the type locality, this species has been reported by Longino (1997), in Costa Rica on the southern Pacific slope. (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica, Panama (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • traini. Pheidole traini Wilson, 2003: 766, figs. (s.w.) PANAMA.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.


DIAGNOSIS Similar in various traits to Pheidole aper, Pheidole bambusarum, Pheidole brevicona, Pheidole dyctiota, Pheidole laeviventris, Pheidole lutzi, Pheidole risii, Pheidole rugatula, Pheidole senilis, Pheidole sigillata, Pheidole trachyderma, differing as follows.

Major: yellow to dark reddish brown; head subrectangular, with almost perfectly straight sides in full-face view; occipital cleft deep, and occipital lobes subangular; in side view frontal lobes project well forward as conspicuous lobes; all of posterior half of dorsal head surface except for occipital margin rugoreticulate; pronotal dorsum rugoreticulate; mesonotal dorsum rugulose; most of sides of mesosoma with scattered short rugulae and carinulae; pilosity very dense, and in mesosoma much of it curved to give a woolly appearance; propodeal spines long, stout, and vertical on propodeal dorsal face.

Minor: all of posterior head surface and pronotum and dorsa of mesothorax and propodeum rugoreticulate; occiput narrowed but lacking nuchal collar.

MEASUREMENTS (mm) Holotype major: HW 1.64, HL 1.80, SL 0.66, EL 0.18, PW 0.96. Paratype minor: HW 0.70, HL 0.70, SL 0.62, EL 0.10, PW 0.50.

COLOR Major: concolorous medium reddish yellow (types) or dark reddish brown (Costa Rica: San Vito).

Minor: head and mesosoma medium reddish yellow, with waist, gaster, and appendages medium yellow (types) to dark reddish brown (Costa Rica: San Vito).

Pheidole traini Wilson 2003.jpg

Figure. Upper: holotype, major. Lower: paratype, minor. Scale bars = 1 mm.

Type Material

PANAMA: Cerro Campana, col. William L. Brown. Museum of Comparative Zoology


Named in honor of Russell E. Train, pioneer in the modern movement of global conservation.


References based on Global Ant Biodiversity Informatics

  • Wilson E. O. 2003. Pheidole in the New World. A dominant, hyperdiverse ant genus. Cambridge, Mass.: Harvard University Press, [ix] + 794 pp.