A new Peruvian musapsocid genus and species (Psocoptera: Musapsocidae)

Musapsocoides nadleri, n. gen., n. sp., is described from a pair of specimens collected in Tarma, Peru. It is the sister group to Musapsocus, the only other known genus of the family, from which it differs in having three-segmented tarsi, male clunium without papillar or spinous fields, third valvula bilobed epically, subgenital plate with only a few stout setae located medially on distal margin, and in shape and structure of the male epiproct and phallosome and the female spermathecal duct. The discovery of this genus will probably have a considerable impact on the interpretation of the phylogeny of the electrentomoid Psocoptera.