Sisoroidea

Sisoroidea is sister to the Loricarioidea.^[1] The monophyly of this superfamily is supported by a number of morphological characters.^[2] Amblycipitidae is the most basal family and is sister to the remaining families.^[1] Based on morphological data, Erethistidae is the sister group to Aspredinidae, with Sisoridae being the sister group of the clade formed by these two families.^[3] However, it has been proposed to move the erethistid genera back into Sisoridae.^[4] Also, some authors have removed Aspredinidae from Sisoroidea, having found it to be more closely related to Doradoidea (Doradidae, Auchenipteridae, and possibly Mochokidae) with morphological and molecular evidence.^[5][6]

Sisoroidea includes almost exclusively Asiatic catfish families with the exception of Aspredinidae, which is native to South America.^[2]