Formicidae, Hymenoptera, Insecta, Arthropoda, Animalia
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Range
Costa Rica: throughout the country in wet to moist habitats.
Identification
Face sublucid, with fine puncta, intervals between puncta wider than puncta diameters; propodeum not strongly tectiform (tent-like), sides broadly round into relatively broad dorsal face (propodeum tectiform in JTL-001); petiole moderately thin, scale-like in lateral profile, anterior and posterior faces weakly converging to broadly rounded dorsal face; color orange to darker red brown. Measurement data.
Natural History
This tiny species, the smallest known to me, occurs in a wide variety of habitats throughout Costa Rica. It is common in the lowland rainforest of La Selva and in the cloud forest of Monteverde. Although common in mature forested habitats, it is not restricted to them; I have collected it in Parque Nacional, a small city park in the middle of San Jose! Workers were in some dead wood at the base of a tree, at the edge of a city sidewalk. The species occurs very often in Winkler samples of leaf litter from the forest floor. I rarely collect it by any other means. I once found a nest under loose bark of dead wood, and I once observed workers emerging from under loose bark to recruit to a dead tabanid.
I have seen an ergatoid male of what I assume to be this species, from La Selva Biological Station. It was an isolated specimen from a soil sample, not associated with workers. I associate it with this species due to its small size.
Taxonomic Notes
Bill Brown identified material of this species from the Osa Peninsula (JTL4Apr82/0900) as "near parva." The type locality of parva (Forel 1909) is Guatemala, and in Kempf (1972) the species is only known from the type locality.
Literature Cited
Forel, A. 1909. Ameisen aus Guatemala usw., Paraguay und Argentinien (Hym.). Dtsch. Entomol. Z. 1909:239-269.
Kempf, W. W. 1972. Catalogo abreviado das formigas da regiao Neotropical. Stud. Entomol. 15:3-344.
Page author:
John T. Longino, The Evergreen State College, Olympia WA 98505 USA.longinoj@evergreen.edu
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