Othniel Charles Marsh
"Psalodon fortis" was named by Othniel Charles Marsh in 1887 and G. G. Simpson in 1927. It is also known as "Allodon fortis" (Marsh 1887). Remains have been found in the Upper Jurassic Morrison Formation of Wyoming (United States). The holotype is at the Peabody Museum of Natural History at Yale University.