Redescription of Picidectes chapini and synonymy of Picidectes and Toucanectes (Acari: Hypoderatidae) from piciform birds.
A redescription of P. chapini is presented with particular attention to the undescribed details of idiosomal and leg chaetotaxy, solenidiotaxy and size variation in the range of measured characters of the species. This is the second record of P. chapini from the northern flicker (Colaptes auratus) in North America (from California and New Mexico). Aside from the mediolateral constriction just posterior to epimera IV, the morphology, chaetotaxy and solenidiotaxy of P. chapini are very similar to those of the 2 known species in the genus Toucanectes described from a toucan and woodpecker (both Piciformes), respectively. Thus, the genus Toucanectes is recognized as a junior synonym of Picidectes. The genus Picidectes is redescribed to include P. chapini as the type species, and P. ramphastos comb. nov. (= T. ramphastos), from Ramphastos sulfuratus, and P. dryocopi comb. nov. (= T. dryocopi), from Dryocopus pileatus.