Cardiocondyla obscurior Wheeler 1929

Myrmicinae, Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia

worker lateral view
worker dorsal view

worker face view


A cosmopolitan tramp species, widespread in the tropics (Seifert 2003).


Propodeal suture impressed; mesosoma light brown or orange, contrasting with darker gaster; propodeal spines relatively long; postpetiolar sternite with angular anterolateral projections (not blunt gibbosities as in emeryi).

Similar species: emeryi.

Natural History

These are ants of scrubby vegetation and synanthropic habitats that can be expected in any low to midelevation area of human habitation in Costa Rica. Cardiocondyla obscurior tends to be arboreal, nesting in plant cavities in low vegetation. Most other Cardiocondyla nest in the ground (Seifert 2003).

I collected this species from a treetrunk in front of the Juan Santa Maria International Airport, in a landscaped area. Joel Dunn collected a nest from the domatium of a Cordia alliodora tree at La Selva Biological Station. John Noyes collected workers in sweep samples from La Selva.

Literature Cited

Seifert, B. 2003. The ant genus Cardiocondyla (Insecta: Hymenoptera: Formicidae): A taxonomic revision of the C. elegans, C. bulgarica, C. batesii, C. nuda, C. shuckardi, C. stambuloffii, C. wroughtonii, C. emeryi, and C. minutior species groups. Annalen des Naturhistorischen Museums in Wien Serie B Botanik und Zoologie 104B:203-338.

Page author:

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

Date of this version: 16 May 2007.
Previous versions of this page: 22 March 2003
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