de Pinna, Mdrio C.C., and Richard P. Vari. Monophyly and Phylogenetic Diagnosis of the Family Cetopsidae, with Synonymization of the Helogenidae (Teleostei: Siluriformes). Smithsonian Contributions to Zoology, number 571, 26 pages, 20 figures, 1995.—The Neotropical catfishes currently recognized as the families Cetopsidae and Helogenidae are hypothesized to be sister groups. The two taxa share ...
