Resumo Ácaros ectoparasitos de morcegos são reportados pela primeira vez para os Estados do Ceará e Mato Grosso. Os espécimes de morcegos com seus ectoparasitos foram coletados em áreas dos biomas Caatinga e Pantanal. Foi coletado o total de 450 espinturnicídeos representados por dois gêneros e dez espécies sobre 15 espécies de morcegos na Reserva Particular do Patrimônio Natural Serra das Almas, Ceará, Nordeste Brasileiro e em sete espécies de morcegos coletadas na Reserva Particular do Patrimônio Natural Sesc Pantanal, Mato Grosso, Centro-Oeste Brasileiro foram encontrados 138 espinturnicídeos representados por dois gêneros e quatro espécies. A ocorrência do gênero Cameronieta e da espécie Mesoperiglischrus natali, além de quatro novas associações (P. iheringi - Chiroderma vizottoi; Periglischrus micronycteridis - Micronycteris sanborni; P. paracutisternus – Trachops cirrhosus; Spinturnix americanus - Myotis riparius) são registradas pela primeira vez no Brasil.

Abstract A first survey of mite species that ectoparasitize bats in the states of Ceará and Mato Grosso was conducted. The specimens of bats and their mites were collected in areas of the Caatinga and Pantanal biomes. A total of 450 spinturnicids representing two genera and ten species was collected from 15 bat species in the Private Reserve of the Natural Patrimony Serra das Almas, Ceará State, Northeast Brazil and 138 spinturnicids represented by two genera and four species were found in seven bats species collected in Private Reserve of the Natural Patrimony Sesc Pantanal, Mato Grosso State, Central-Western Brazil. The occurrence of Cameronieta genus and the species Mesoperiglischrus natali as well as four new associations (Periglischrus iheringi - Chiroderma vizottoi; P. micronycteridis - Micronycteris sanborni; P. paracutisternus – Trachops cirrhosus; Spinturnix americanus - Myotis riparius) are registered for the first time in Brazil.

This paper includes a revision of the species considered up to now in the genus Lasiodera Gray, 1832 with a detailed study of external morphology as well as males external genitalia which made to propose the separation into two genera, Lasiodera Gray, 1832 and Philyra Laporte, 1836, beeing the second one revalidated, which is now constituted by the following species: Philyra basalis (Racca Filho & Santos, 1988) comb.n., P. helopioides Laporte, 1836 comb.n., P. jucunda (Schenkling, 1900) comb.n., P. quadrivittata (Peracchi, 1960) comb.n., P. stenochioides (Chevrolat, 1874) comb.n. and P. viridis (Pic, 1936) comb.n.. The male genital structures, showing specific differences, are illustrated and discussed. Lasiodera malleri (Pic, 1933) is considered a synonym of L. ruficollis (Gorham, 1877). Lasiodera ornata (Klug, 1842) and L. voluptuosa (Thomson, 1860) had not their external genitalia examinated because they are not represented in the collections studied. To identify the species of the genera, systematic keys are also presented.

A revision of the family Spelaeorhynchidae Oudemans, 1902 with descriptions of three new species from Brazil, Peru and Colombia.