Pheidole tristicula

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

At Cuzco Amazonico, near Puerto Maldonado, Peru, Stefan Cover and John E. Tobin found a colony in mature rainforest, nesting in humus on top of a rotten log. Similarly, Mark Moffett collected a colony from a rotten log at Saul, French Guiana. (Wilson 2003)

Identification

See the description in the nomenclature section.

Keys including this Species

Distribution

A very widespread but overall not abundant species. I have identified series from Veracruz, Mexico; Honduras; Colombia; French Guiana; Trinidad; and scattered localities in Amazonian Brazil, Ecuador, Peru, and Bolivia. (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guatemala, Honduras, Mexico, Peru (type locality), Trinidad and Tobago.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • tristicula. Pheidole tristicula Wilson, 2003: 768, 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.

Description

DIAGNOSIS A small, bicolorous, mostly yellow species belonging to a group of ambiguous species composing the "carapuna complex" (Pheidole boltoni, Pheidole carapuna, Pheidole cornicula, Pheidole cuprina, Pheidole eriophora, Pheidole jivaro, Pheidole manuana and Pheidole tristicula). All are relatively small in size, with the major possessing a reduced mesonotal convexity and cephalic sculpturing that consists entirely of longitudinal carinulae that extend to or almost to the occipital border seen in full-face view. All also have a minor with a broad, concave occiput, which lacksa collar. Among these species, P. tristicula is distinguished in the major by combination of its elevated humerus in dorsal-oblique view, laterally angular postpetiolar node, transversely carinulate pronotal dorsum, partially shagreened first gastral tergite, and in color. It is closest to carapuna.

MEASUREMENTS (mm) Holotype major: HW 1.08, HL 1.24, SL 0.64, EL 0.l8, PW 0.60. Paratype minor: HW 0.56, HL 0.60, SL 0.54, EL 0.l2, PW 0.38.

COLOR Major and minor: head and meso soma light reddish yellow ("orange"), rest of body and appendages clear medium yellow.


Pheidole tristicula Wilson 2003.jpg

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

Type Material

PERU: Cuzco Amaz6nico, 15 Ian northeast of Puerto Maldonado, Tambopata, col. Stefan Cover and John E. Tobin. Museum of Comparative Zoology

Etymology

L tristicula, dim. of tristis, sad.

References