[1] It is endemic to Brazil where it occurs in the Amazon Basin.

[1][2] Like its stegophiline relatives, they possess a sucking, disk-like mouth, along with inter- and opercular spines which facilitates adhesion to its food items, though this species is a scavenger, unlike its ectoparasitic relatives.

During feeding events involving vertebrate carcasses, P. microps may be associated with other species of scavengers; the whale candirus, Cetopsis candiru and Ce.

coecutiens, are not closely related to P. microps despite also being considered "candiru"; the vulture catfish Calophysus macropterus is a much larger scavenger that may also join the candirus at the carcass.

This Trichomycteridae-related article is a stub.