Pheidole nigricula

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

Pheidole nigricula inbiocri002279729 p 1 high.jpg

Specimen Label

This tiny species inhabits mature rainforest where it nests in rotten hollow twigs in leaf litter on the forest floor. (Wilson 2003)

Identification

See the description in the nomenclature section.

Keys including this Species

Distribution

Atlantic lowlands to 800 m in Costa Rica (Longino 1997).

Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica (type locality), Honduras, Nicaragua.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Minor

Nomenclature

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

  • nigricula. Pheidole nigricula Wilson, 2003: 472, 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.

Description

DIAGNOSIS Similar in various traits to Pheidole exquisita, Pheidole nitella, Pheidole pygmaeaand Pheidole sagittaria, differing as follows.

Major: blackish brown; very small; head elongate; frontal triangle not demarcated; eyes placed well forward on head; humerus low and lobate; propodeal spines equilaterally triangular; postpetiole from above elliptical; dorsal surface of head, including occiput but not midclypeus, foveolate; mesosoma almost entirely smooth and shiny.

Minor: carinulae limited to antennal fossae; all of head and mesosoma smooth and shiny; propodeal spines moderately long, and thin; occiput broad, its margin weakly concave, and lacking nuchal collar.

MEASUREMENTS (mm) Holotype major: HW 0.56, HL 0.70, SL 0.26, EL 0.10, PW 0.34. Paratype minor: HW 0.34, HL 0.40, SL 0.30, EL 0.06, PW 0.24.

COLOR Major: concolorous blackish brown, appendages medium brown. Minor: sides of mesosoma medium to dark reddish brown; rest of body, and appendages, dark, almost blackish brown.


Pheidole nigricula Wilson 2003.jpg

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

Type Material

COSTA RICA: La Selva Biological Station, near Puerto Viejo, Heredia, col. Stefan Cover. Museum of Comparative Zoology

Etymology

L nigricula, little dark one.

References