Pheidole truncula

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

Pheidole truncula inbiocri001283920 p 1 high.jpg

Specimen Label

Occurs at Penas Blancas in wet forest and nests at least in part arboreally, apparently in live plant stems (Longino 1997). On one occasion workers were mixed with those of the rare army-ant-like ponerine Simopelta, making it likely that the truncula were under attack as prey at the moment of collection. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Known only from several collections from the type locality. (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica (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.

  • truncula. Pheidole truncula Wilson, 2003: 548, figs. (s.w.) COSTA RICA.

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


DIAGNOSIS A typical member of the lamia group: the major has a phragmotic head, with the anterior portion incorporating the c1ypeus and mandibles flattened (truncated), and deep antennal scrobes. This species is easily distinguished from the other members of the lamia group (Pheidole colobopsis, Pheidole lamia, Pheidole pelor) by the complete absence of carinulae on the head, which is instead foveolate and opaque, and by other differences in body form and sculpturing as depicted.

MEASUREMENTS (nun) Holotype major: HW 0.74, HL 0.94, SL 0.42, EL 0.14, PW 0.44. Paralectotype minor: HW 0.50, HL 0.52, SL 0.40, EL 0.10, PW 0.30.

COLOR Major: concolorous yellowish brown.

Minor: light brown except for funiculus and tarsi, which are dark yellow.

Pheidole truncula Wilson 2003.jpg

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

Type Material

COSTA RICA: Penas Blancas, Alajuela, lOo30'N 84°70W 940 m, col. col. J. T. Longino. Instituto Nacional de Biodiversidad


L truncula, diminutive of trunca, cut off, maimed, referring to the head of the major.