Trichomycteridae

Trichomycteridae is a family of catfishes commonly known as pencil catfishes or parasitic catfishes; though only certain species are parasitic, those are some of the few parasitic chordates known. This family is prohibited from being imported into various parts of the United States due to their reputation as parasites.

Trichogenes is a genus of freshwater ray-finned fish belonging to the family Trichomycteridae, the pencil and parasitic catfishes. It is currently the only genus in the monogeneric subfamily Trichogeninae. These catfishes are found in South America.