Idiophyseter

{{Short description|Extinct genus of whales}}

{{Automatic taxobox

|fossil_range = Middle Miocene

|taxon = Idiophyseter

|authority = R. Kellogg, 1925

}}

Idiophyseter{{cite web |title=Contributions to Palaeontology from the Carnegie Institution of Washington |url=https://www.phylonimbus.com/references/journal/5166/contributions-to-palaeontology-from-the-carnegie-i/}} is a genus of macroraptorial sperm whale from the Miocene. Its fossils have been found in Templeton California.{{cite web |title=Templeton (Miocene of the United States) |url=https://paleobiodb.org/classic/basicCollectionSearch?collection_no=45495&is_real_user=1 |website=PBDB}} Idiophyseter was small in size compared to modern genera and its maxilla has single-rooted alveoli. It lacked ventral internal process of the sort present in the modern day genus of sperm whale (Physeter).{{cite journal |title=M. D. Uhen, R. E. Fordyce, and L. G. Barnes. 2008. Odontoceti. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary Mammals of North America II:566-606 |date=2006-12-13 }}