Pheidole micridris

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

The type specimen was collected from a “red rotten” log on the floor of terra firme forest. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Only known from the type locality.

Distribution based on Regional Taxon Lists

Neotropical Region: Ecuador, Peru (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



Only known from the major.


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

  • micridris. Pheidole micridris Wilson, 2003: 455, figs. (s.w.) PERU.

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


DIAGNOSIS Unique, distinguished in the major by the very small size; circular head shape in full-face view; eyes set far forward in the head; raised promesonotum that drops through a long, steep face to the metanotum; conate postpetiole; restriction of carinulae to the frontal lobes and antennal fossae; and completely foveolate head and mesosoma.

Minor: unknown.

MEASUREMENTS (mm) Holotype major: HW 0.64, HL 0.64, SL 0.34, EL 0.12, PW 0.32.

COLOR Major: dark yellow, with gaster a shade darker of brownish yellow.

Pheidole micridris Wilson 2003.jpg

Figure. Unique holotype, major. Scale bars = 1 mm.

Type Material

PERU: Cuzco Amazónico, 15 km northeast of Puerto Maldonado, Madre de Dios, col. Stefan Cover and John E. Tobin. Museum of Comparative Zoology


Gr micridris, small and knowing one.