Lachnomyrmex laticeps Feitosa and Brandčo 2008

Myrmicinae, Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker face view

worker lateral view


Costa Rica: Mid-elevation Atlantic slope.


Worker: first gastral tergum with abundant erect setae; metanotal groove impressed, such that dorsal face of propodeum forms a separate plane relative to convex promesonotum; Weber's length about 1.0mm.

Similar species: scrobiculatus, grandis.

Natural History

Ronald Vargas found a worker and a queen beneath a treefern trunk, during expeditions to the 1100m site on the Barva Transect, an area of mature wet forest in Braulio Carrillo National Park. A worker was collected in a Winkler sample from the same site. Conservation International's TEAM project collected a worker in a Winkler sample at Casa Plastico, a 500m elevation site near the Barva Transect. I found a nest in a clay bank above a small stream, at Refugio Eladio, 800m elevation in the PeĖas Blancas river valley. There was a small flask-shaped entrance structure leading to a small chamber (see figure below). The chamber contained a few workers only, no brood or sexuals.

nest nest
(Images linked to full-size images.)

Literature Cited

Feitosa, R. M., and C. R. F. Brandčo. 2008. A taxonomic revision of the Neotropical myrmicine ant genus Lachnomyrmex Wheeler (Hymenoptera: Formicidae). Zootaxa 1890:1-49.

Page author:

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

Date of this version: 1 April 2009.
Previous versions of this page: 11 April 2008
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