Cephalotes grandinosus (F. Smith 1860)

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker dorsal view

major face view

major lateral view

Major dorsal view (reduced, original).

Line drawings of minor worker dorsal view, major worker dorsal view, from Kempf (1952).


Costa Rica to Brazil, Bolivia. Costa Rica: Osa Peninsula, Guanacaste Province (5km S Liberia; Palo Verde).


Minor worker: eyes situated behind the scrobe, which terminates in front of the eye; lateral border of head convex and upturned above eye, without a rounded excision; lateral margins of mesosoma, including lateral margins of propodeum, with relatively uniform foliaceous crest, which is lighter colored than mesosomal dorsum; petiole with distinct anterior and dorsal faces; propodeal suture distinctly impressed across entire mesosomal dorsum; hind femur with ventral foliaceous crest; color light red brown.

Major worker: eyes situated behind the scrobe, which terminates in front of the eye; head with complete and strongly developed cephalic disk; cephalic disk with arcuate notch anteriorly; in full face view dorsal surface of mandibles visible in notch; surface of cephalic disk orange, coarsely rugose, not smooth and shining.

Natural History

This species appears to be rare in Costa Rica. Andrade and Baroni Urbani (1999) report a collection by Janzen from near Liberia. I have collected it twice, once as stray workers from Palo Verde, and a nest collection from Corcovado (Sirena). The nest was in the high canopy of a Licania tree (Chrysobalanaceae). Much of the crown of this tree was inhabited by an Azteca species, nesting in the live branch tips. But one chamber in a branch tip contained a C. grandinosus nest. The nest contained a few workers and one callow alate queen. There were no Coccoidea inside, in contrast to the Azteca nests which were packed with Coccoidea.

Type Data

Cryptocerus grandinosus F. Smith 1860:76. Type worker: Ega (=Tefe) (Brazil, Amazonas) [BMNH].

Literature Cited

Andrade, M. L. de, and C. Baroni Urbani. 1999. Diversity and adaptation in the ant genus Cephalotes, past and present (Hymenoptera, Formicidae). Stuttgarter Beitrage zur Naturkunde Serie B (Geologie und Palaontologie) 271:1-889.

Kempf, W. W. 1952. A synopsis of the pinelii-complex in the genus Paracryptocerus (Hym. Formicidae). Stud. Entomol. 1:1-30.

Smith, F. 1860. Descriptions of new genera and species of exotic Hymenoptera. J. Entomol. 1:65-84.

Page author:

John T. Longino, The Evergreen State College, Olympia WA 98505 USA.longinoj@evergreen.edu

Date of this version: 27 June 2000
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