This species occurs in mature wet forest. It is a relatively common arboreal ant, nesting in dead branches and under epiphytes. Colonies often appear large, with workers scattered over a wide area. (Longino 2009)
See the description in the nomenclature section.
Keys including this Species
Mexico to Costa Rica.
Distribution based on Regional Taxon Lists
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.
- nitidicollis. Pheidole dimidiata var. nitidicollis Emery, 1896g: 79 (s.w.) COSTA RICA. Subspecies of dimidiata: Emery, 1922e: 107. Raised to species: Wilson, 2003: 474. Senior synonym of sagana: Longin, 2009: 58.
- sagana. Pheidole sagana Wheeler, W.M. 1934g: 169 (s.w.) MEXICO. Junior synonym of nitidicollis: Longino, 2009: 58.See also: Wilson, 2003: 501.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
From Wilson (2003): DIAGNOSIS A small, yellow member of the flavens group whose major has a prominent, rounded humerus that rises well above the mesonotum in dorsal-oblique view, a roughly semicircular outline of promesonotum in side view, and an oval postpetiolar node. Similar to tenerescens but with the major possessing a low mesonotal convexity present (in side view), longer cephalic carinulae, larger propodeal spine and spiracle, and with a brown as opposed to yellow gaster.
See also the less similar Pheidole arhuaca, Pheidole flavifrons, Pheidole minutula, other species listed as close to Pheidole arhuaca, and members of the “flavens complex” listed under flavens (q.v.).
MEASUREMENTS (mm) Lectotype major: HW 0.80, HL 0.84, SL 0.44, EL 0.10, PW 0.40. Minor (Nevis): HW 0.42, HL 0.44, SL 0.40, EL 0.06, PW 0.24.
COLOR Major and minor: yellow.
Figure. Upper: lectotype, major. Lower: minor. Nevis, West Indies, col. Neal A. Weber, associated major compared with lectotype. Scale bars = 1 mm.
Lectotype major worker (here designated, as labeled by Wilson 2003) and associated paralectotype minor worker: Costa Rica, Jiménez [a site near present day La Selva Biological Station] (Alfaro) Museo Civico di Storia Naturale, Genoa (not examined).
Pheidole sagana Lectotype major worker (here designated, as labeled by Wilson 2003) and associated paralectotype minor worker: Mexico, Veracruz, Mirador (Skwarra) Museum of Comparative Zoology (examined).
L nitidicollis, shiny neck, referring evidently to the smooth rear of head. (Wilson 2003)
- Emery, C. 1896g. Studi sulle formiche della fauna neotropica. XVII-XXV. Bull. Soc. Entomol. Ital. 28: 33-107 (page 79, soldier, worker described)
- Emery, C. 1922e. Quelques fourmis nouvelles minuscules. Ann. Hist.-Nat. Mus. Natl. Hung. 19: 107-112 (page 107, subspecies of dimidiata)
- Kempf, W. W. 1972b. Catálogo abreviado das formigas da região Neotropical. Stud. Entomol. 15: 3–344.
- Longino, J.T. 2009. Additions to the taxonomy of New World Pheidole. Zootaxa 2181: 1-90. PDF
- Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 474, Raised to species: new status, fig. major, minor described)