Gnamptogenys alfaroi (Emery 1894)

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view


Costa Rica, Ecuador. Costa Rica: Atlantic slope to 1000m.


Promesonotal suture faintly impressed, not breaking sculpture; scapes fail to reach margin of vertex when laid back; dorsal surface of mandible smooth and shiny; propodeal dorsum transversely striate; large, long-headed species, HL greater than 1.7mm; when head is seen in perfect full-face view, vertex margin evenly convex; blunt but distinct vestiges of paired teeth on the propodeum.


This is a large and conspicuous species, but uncommon. The type specimen is from Jimenez, near present day Guapiles. Brown (1958) reported a collection from Turrialba, and Lattke (1995) reported a collection from Ecuador (Guayas: 3km SW Bucay). I have observed 5 specimens of this species, one from each of the following localities: Alajuela: Casa Eladio, Rio Penas Blancas, 1019'N, 8443'W, 800m (coll. J. Longino); El Aleman, Rio Penas Blancas, 1018'N, 8445'W, 940m (coll. J. Longino); Heredia: 4km NNE Horquetas, 1023'N, 8357'W, 50m (coll. R. Vargas C.); Limon: 16km W Guapiles, 1013'N, 8355'W, 400m (coll. P. Hanson); 6km WNW Pto. Viejo, 940'N, 8249'W, 50m (coll. J. Longino). Two of the collections were of nocturnal foragers, 1-2m high on low vegetation.

Type data

Ectatomma (Gnamptogenys) alfaroi Emery 1894:145. Holotype (unique syntype) queen: Costa Rica, Jimenez (Alfaro).

Literature Cited

Brown, W. L., Jr. 1958. Contributions toward a reclassification of the Formicidae. II. Tribe Ectatommini (Hymenoptera). Bulletin of the Museum of Comparative Zoology 118:175-362.

Emery, C. 1894. Studi sulle formiche della fauna neotropica. VI-XVI. Bolletino della Societa Entomologica Italiana 26:137-243.

Lattke, J. E. 1995. Revision of the ant genus Gnamptogenys in the New World (Hymenoptera: Formicidae). Journal of Hymenoptera Research 4:137-193.

Page author:

John T. Longino, The Evergreen State College, Olympia WA 98505

Date of this version: 14 December 1998
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