Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
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).
Inhabits wet forest floor litter. Known from Winkler and Berlese samples.
Apsychomyrmex tristani Menozzi 1931:269. Syntype workers: Costa Rica, La Palma (Tristan).
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.
John T. Longino, The Evergreen State College, Olympia WA 98505 USA.firstname.lastname@example.org
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