Isthminia
In Depth Isthminia is a genus of river dolphin that lived in Central America during the Miocene. Further Reading - Isthminia panamensis, a new fossil inioid (Mammalia, Cetacea) from the Chagres Formation of Panama and the evolution of ‘river dolphins’ in the Americas. - PeerJ 3:e1227. - N. D. Pyenson, J. Velez-Juarbe, C. S. Gutstein, … Read more