Eurhopalothrix gravis

Longino (2013): This species occurs in mature to second growth wet forest habitats. It is a lowland species, occurring from sea level to 1100 m in Central America. Many specimens are from Berlese and Winkler samples of sifted litter and rotten wood from the forest floor, but unlike many other species, specimens have also been found by direct search, usually isolated workers under loose bark of rotten wood. An alate queen was collected in a flight intercept trap in Belize, 19–28 August 2007 (P. W. Kovarik). Where it has been collected it is typically low density, occurring in less than 1% of Winkler samples, but one exception was a site at 1100 m elevation on the Barva Transect in Costa Rica, where it occurred in 8% of samples.

Distribution based on Regional Taxon Lists
Neotropical Region: Belize, Costa Rica, Dominica, Guatemala, Honduras, Lesser Antilles, Mexico, Nicaragua, Puerto Rico, Venezuela.

Nomenclature

 *  gravis. Rhopalothrix (Rhopalothrix) gravis Mann, 1922: 40, fig. 19 (w.q.m.) HONDURAS. Wheeler, G.C. & Wheeler, J. 1955a: 117 (l.). Combination in Eurhopalothrix: Brown & Kempf, 1960: 211. Senior synonym of reichenspergeri: Brown & Kempf, 1960: 211.
 * reichenspergeri. Rhopalothrix reichenspergeri Santschi, 1923g: 1263 (w.) BRAZIL. Combination in Octostruma: Brown, 1949f: 92. Junior synonym of gravis: Brown & Kempf, 1960: 211.

Additional References

 * Longino, J.T. 2013. A review of the Central American and Caribbean species of the ant genus Eurhopalothrix Brown and Kempf, 1961 (Hymenoptera, Formicidae), with a key to New World species. Zootaxa 3693, 101–151.