Eurhopalothrix oscillum

This species inhabits mature wet forest from mid-elevation slopes to lower cloud forest. It is known from 300–1500 m elevation, but is most abundant from 500–1000 m. All specimens are from Winkler samples of sifted litter and rotten wood from the forest floor. On Cerro Saslaya in Nicaragua, sampling along an elevational transect from 300–1600 m yielded the species in samples from 760–1180 m. It occurred in 11% of miniWinkler samples at a 1000 m site that was intensively sampled but did not occur at a similarly sampled 300 m site. Similarly, on Cerro Musún, a transect from 700–1400 m yielded the species in the 1000–1100 m interval. In the Peñas Blancas Valley in the Cordillera de Tilarán, Costa Rica, it is moderately frequent in Winkler samples at 800 m elevation, but does not occur above 1000 m. On the Barva Transect in the Cordillera Volcánica Central, it occurred in 1% of miniWinkler samples at 300 m elevation and 5% of miniWinkler samples at 500 m elevation. It was not encountered at similarly sampled sites at 1100 m, 1500 m, and 2000 m.

Distribution
This taxon was described from Costa Rica.

Nomenclature

 *  oscillum. Eurhopalothrix oscillum Longino, 2013: 133, figs. 14C, 27, 36 (w.) COSTA RICA.