Eurhopalothrix semicapillum

This species inhabits mature wet forest in mid-montane to lower cloud forest habitats. It is known from 500–1500 m elevation but is most common around 1100 m. All specimens are from Winkler samples of sifted litter and rotten wood from the forest floor. In the Cordillera de Tilarán and C. de Guanacaste it occurs in upper montane forest but not in the cool, wet ridge-crest cloud forest. On the Barva transect it was rare at 500 m (

Costa Rica.

Mandible with single tooth row; face with 14–18 specialized spatulate setae (anterior row 8, middle row 4 (2), posterior row 6 (4); ground pilosity of face spatulate, decumbent, weakly differentiated from specialized projecting setae, in discrete patches on posterolateral face, leaving median strip bare, anterior border of ground pilosity gradual, extending a short distance beyond anterior row of specialized projecting setae; posteromedian vertex with shallow depression; pronotum with 1 pair spatulate setae, lacking on mesonotum; pair of spatulate setae on posterior border of petiolar node; first gastral tergite with at most 3 pairs spatulate setae in two longitudinal rows, posterior pair sometimes flanked by outer pair. Similar to E. circumcapillum, E. machaquila, E. megalops, E. ortizae, E. oscillum, E. schmidti.

A cryptic inhabitant of forest floor leaf litter and rotten wood in Costa Rican cloud forests.

Eurhopalothrix semicapillum Longino, 2013a PDF: 139, figs 2B, 6B, 14D, 30, 36 (w.q.) COSTA RICA. Neotropic. AntCat AntWiki