Adelomyrmex tristani (Menozzi 1931)

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker lateral view
worker dorsal view

worker face view

worker lateral view

worker face view

Additional SEM images of worker: lateral view of head (small, large), lateral view of lower head (small, large), mandible (small, large), dorsal view of mesosoma (small, large), lateral view of petiole and postpetiole (small, large).


Mexico to Colombia (type locality Costa Rica) (Fernandez 2003). Costa Rica: montane forests throughout country, becoming less common at lower elevations. Very common in Monteverde cloudforest; rare at La Selva. Material I have seen from Mexico is from cloud forest above 1800m.


Face and dorsum of mesosoma completely striate; hypostomal tooth absent; postpetiole broadly rounded posteriorly, not projecting over gaster; eye composed of about 8 facets; Weber's length 0.69mm (n=1).

Natural History

Inhabits wet forest floor litter. Known from Winkler and Berlese samples.

Type Data

Apsychomyrmex tristani Menozzi 1931:269. Syntype workers: Costa Rica, La Palma (Tristan).

Literature Cited

Fernández C., F. 2003. Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae). Zootaxa 361: 1–52.

Menozzi, C. 1931. Contribuzione alla conoscenza del "microgenton" di Costa Rica. III. Hymenoptera - Formicidae. Boll. Lab. Zool. Gen. Agrar. R. Sc. Super. Agric. 25:259-274.

Page author:

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

Date of this version: 2 December 2003.
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