We recorded sounds of nine individuals of a wild-caught neotropical catfish, the doradid Orinocodoras eigenmanni.
Kastberger (9) observed that for field recordings of doradid sounds, pulse pattern was unchanged for up to 30 cm.
Sound-generating and -detecting motor system in catfish: design of swimbladder muscles in doradids
Since such a feature is present in all the pimelodids studied excepting the peculiar and highly derived pimelodin genus Hypophthalmus, and a somewhat similar feature is only present, among non-pimelodid catfishes, in some members of the phylogenetically distant Doradoidea (i.e., in some mochokids, auchenipterids and doradids
in the silurids, cranoglanidids, ictalurids and doradids
, as well as in part of the mochokids (Synodontis) and auchenipterids (Ageneiosus) examined, there is a groove, or a fossa, between the dorsal surfaces of the frontal and the lateral ethmoid.