Meherrinia isoni

Meherrinia isoni is an extinct river dolphin, the only known species of the genus Meherrinia, described in 2012 by Geisler and colleagues from fossils found along the Meherrin River in North Carolina, in the United States. In most respects it was intermediate in form between the living Amazon river dolphin and the La Plata dolphin, although it is probably more closely related to the former. The fossil came from what are believed to be marine deposits dating from the late Miocene, so it was a marine rather than freshwater animal, and as of 2012 it was the only known marine genus of the family Iniidae. The Paleobiology Database gives a slightly younger age range, from the Zanclean into the Piacenzian.