Speleopsobius, new genus

Type species: Speleopsobius weaveri, new species

Diagnosis. Differs from all other North American henicopid and anopsobiid genera in the characteristic deep, subtriangular embayments of some of the tergites, in the high number (up to 60) of antennal articles and in the length of the largest adults, about twice that of any other North American anopsobiid or henicopid.

Description. As for the type and only species, see below.

Distribution. Lava tubes in south-central Idaho.

Etymology. Greek “Speleo-“ indicating the underground habitat, combined with “-opsobius” to indicate placement in the Anopsobiidae . Gender is masculine.