Beetles (Coleoptera) of Peru: A Survey of the Families. Dryopidae, Limnichidae, Luctrochidae, Psphenidae, and Ptilodactylidae

Abstract

Dryopidae Diversity in Peru: 3 genera, 3+ species. Recognition: All adult dryopids have short, pectinate antennae. Adult Dryops and Onopelmus are covered with erect setae that float them to the surface if submerged. Adult Elmoparnus have a shiny black exterior. Larvae are terrestrial and found in the sand banks of streams; very few are known. Dryops occurs world-wide with many species, including a host of undesecribed species. There is little external differentiation and the species are generally distinguished with genitalic dissections. Habitat: Some dryopids are aquatic and found in the stream substrates while others occur on emergent vegetation and sticks protruding from streams. Many are collected at lights at night; for these the habitat is unknown. A few dryopids are entirely terrestrial with the adults and larvae found in forest leaf litter. Notes: Since much of Peru has never been collected systematically, many more genera and species will be found to occur there. The following is a checklist of Peruvian Dryopidae, based on the publications of Spangler (1980) and Spangler and Perkins (1977), and on personal collections. * 5 endemic to Peru. Checklist: Dryops undetermined species Elmoparnus dasycheilus Spangler and Perkins, 1977 Onopelmus inca Spangler, 1980*