Fauchald, K. (1982). Revision of Onuphis, Nothria, and Paradiopatra (Polychaeta: Onuphidae) based upon type material. Smithsonian Contributions to Zoology. 356: 1-109.
A revision of type material of species named in, or assigned to, Onuphis, Nothria, and Paradiopatra has lead to the recognition of three new genera in addition to the ones previously named for the group. An evaluation of the variability of various morphological features used as taxonomic characters is also given.