Hectopsyllid

Loss of bristles, or reduction in their size, is characteristic of other ectoparasites with a burrowing or semisedentary habit, as exemplified by the tungid and hectopsyllid fleas.

There are sticktight fleas that parasitize bats, namely, some hectopsyllids and pulicids, but they are not pertinent to this discussion since they have evolved other means to solve the problems of infesting bats:[…].