Pheidole biolleyi

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to: navigation, search
Pheidole biolleyi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. biolleyi
Binomial name
Pheidole biolleyi
Forel, 1908

Pheidole biolleyi jtlc000014072 profile 1.jpg

Pheidole biolleyi jtlc000014072 dorsal 1.jpg

Specimen labels


According to Longino (1997), colonies of biolleyi inhabit cloud forests, where they nest in the soil. He has observed workers foraging both on the ground and in low vegetation. (Wilson 2003)


See the description in the nomenclature section.

Keys including this Species


Pheidole biolleyi occurs in the upland Central Valley of Costa Rica around Cartago and Monteverde. (Wilson 2003)

Distribution based on Regional Taxon Lists

Neotropical Region: Costa Rica (type locality), Mexico.

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.

  • biolleyi. Pheidole biolleyi Forel, 1908b: 48 (s.w.q.m.) COSTA RICA. Senior synonym of tristani: Wilson, 2003: 170.
  • tristani. Pheidole biolleyi subsp. tristani Forel, 1908b: 50 (s.w.) COSTA RICA. Junior synonym of biolleyi: Wilson, 2003: 170.

This following is included in the notes about biolleyi in Wilson (2003): Pheidole biolleyi Forel 1908c: 48. Syn.: Pheidole biolleyi tristani Forel 1908c: 50, n. syn. The syntypes of biolleyi used in the figure, and which are housed in the Museum of Comparative Zoology, Harvard, are from La Palma, 1600 m. The type locality given by Forel is “Costa del Tablazo,” which Longino (1997) suggests is the same as Cerro Tablazo, located at about 1500 m near Cartago. There are differences between my drawings of the La Palma specimens and Longino’s photographs in the shapes of the head and postpetiole, but otherwise the series appear close and I am treating them as conspecific. The tristani syntypes Musee d'Histoire Naturelle Genève vary in head shape in the same way, and otherwise appear identical to the La Palma biolleyi syntypes.


From Wilson (2003): This species appears to be intermediate between the biconstricta and diligens groups, and is therefore placed in the latter only tentatively. It is distinguished in the major by variable 2- or 4-dentate hypostoma (as in biconstricta), smaller size, absence of a rugoreticulum on the head, smooth first gastral tergite, and abundant, subappressed hairs on the first gastral tergite.

MEASUREMENTS (mm) Syntype major: HW 1.14, HL 1.22, SL 0.94, EL 0.16, PW 0.60. Syntype minor: HW 0.64, HL 0.78, SL 1.00, EL 0.16, PW 0.44.

COLOR Major: concolorous light orange.

Minor: concolorous light brownish yellow.

Pheidole biolleyi Wilson 2003.jpg

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

Syntype Specimen Labels

Type Material

COSTA RICA: La Palma, 1600 m. Musee d'Histoire Naturelle Genève and Museum of Comparative Zoology - as reported in Wilson (2003)


Named after the collector, Paul Biolley. (Wilson 2003)


  • Forel, A. 1908c. Fourmis de Costa-Rica récoltées par M. Paul Biolley. Bull. Soc. Vaudoise Sci. Nat. 44: 35-72 (page 48, soldier, worker, queen, male described)
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 170, fig. major, minor described, senior synonym of tristani)