Pheidole adrianoi

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Pheidole adrianoi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. adrianoi
Binomial name
Pheidole adrianoi
Naves, 1985

Pheidole adrianoi casent0104273 profile 1.jpg

Pheidole adrianoi casent0104273 dorsal 1.jpg

Specimen Label

Marcio Naves (1985) found P. adrianoi common within its range, nesting in sandy soil in clear areas within forests—a habitat also preferred by P. metallescens, which resembles it in the field to the naked eye. According to Stefan Cover (personal communication), adrianoi is typically associated with white-sand gaps in pine-oak forest. The nest entrance, surrounded by a crater of excavated soil, leads through a vertical tunnel 1–2 mm in diameter to a main chamber 30 to 40 cm beneath the surface. Mature colonies contain about 60 majors and more than 300 minors. Both castes engage in strictly diurnal foraging, and the majors participate in the retrieval of food. The main diet is seeds, although the workers also scavenge for small dead arthropods. The main flights of the winged sexual forms occur in July and August. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Central and northern Florida, west to Okaloosa Co. in the Florida panhandle. (Wilson 2003)

Distribution based on Regional Taxon Lists

Nearctic Region: United States (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.

  • adrianoi. Pheidole adrianoi Naves, 1985: 56, figs. 25, 26, 33, 53, 54 (s.w.q.) U.S.A. See also: Wilson, 2003: 555.

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 brown member of the pilifera group distinguished by the following combination of traits.

Major: diminished, nearly invisible mesonotal convexity; metanotal groove absent. Metanotal profile forming a continuous line with that of the propodeal basal face; propodeal spines long, thick, blunt-tipped; mesopleuron and sides of pronotum and propodeum completely covered by longitudinal carinulae, but promesonotal dorsum smooth and shiny; postpetiolar node diamond-shaped viewed from above.

Minor: profile of promesonotal dorsum smoothly convex; propodeal spines short and stout; mesopleuron and side of propodeum foveolate and opaque but lacking carinulae. Close to Pheidole davisi but differing in the above and other characters.

MEASUREMENTS (mm) Paratype major: HW 0.86, HL 0.92, SL 0.46, EL 0.14, PW 0.44. Paratype minor: HW 0.38, HL 0.42, SL 0.38, EL 0.10, PW 0.24.

COLOR Major: body mostly plain medium brown, gaster dark brown, appendages yellowish brown.

Minor: body medium to dark brown, appendages medium brown.

Pheidole adrianoi Wilson 2003.jpg

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

Type Material

FLORIDA: Gainesville, Alachua Co., Florida, col. Marcio A. Naves. (Wilson 2003) Museum of Comparative Zoology and Florida State Collection of Arthropods - as reported in Wilson (2003)


Eponymous. (Wilson 2003)


  • Naves, M. A. 1985. A monograph of the genus Pheidole in Florida, USA (Hymenoptera: Formicidae). Insecta Mundi 1: 53-90 (page 56, figs. 25, 26, 33, 53, 54 soldier, worker, queen described)
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 555, fig. major, minor described)