Discothyrea JTL-005 Longino ms

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view


Costa Rica (Osa Peninsula).


Antennae 8-9 segmented; face densely punctulate, mat (not shiny); interantennal lamella projecting as an acute angle between antennal insertions, descending to relatively shorter clypeal shelf, so that lamella appears triangular in lateral view; lamella relatively large compared to humilis, with ventral margin originating at anterior border of clypeus, such that in side view ventral portion of lamella is usually visible; clypeus projecting relatively farther beyond mandibles, compared to humilis; anterior border of clypeus somewhat truncate in face view; color uniformly red brown.

This species has the interantennal lamella like sexarticulata, but the form of the clypeus and antennal segmentation are like horni.

Natural History

Discothyrea are extremely small, cryptobiotic inhabitatants of forest leaf litter (see Genus Overview). For JTL-005 in Costa Rica, I have seen only 1 worker, in a Winkler sample of forest floor leaf litter, from Sirena in Corcovado National Park.


This may just be an aberrant specimen of horni.

Page author:

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

Date of this version: 16 September 2005.
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