Discothyrea sexarticulata Borgmeier 1954

Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view

Range

Southeastern Brazil (type locality Santa Catarina), Costa Rica. Costa Rica: Atlantic slope rainforest (Hitoy Cerere, Turrialba, Barva Transect, Peľas Blancas).

Identification

Antennae 6 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.

Natural History

Discothyrea are extremely small, cryptobiotic inhabitatants of forest leaf litter (see Genus Overview).

This species is known from Winkler and Berlese samples of forest floor litter. On the Barva Transect in Braulio Carrillo National Park, it occurs from 300-1100m elevation. It is much less common than D. horni.


Page author:

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


Date of this version: 16 September 2005.
Previous versions of this page: 3 January 1999, 18 February 1999, 26 February 1999.
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