This is an extensive morphometric project in which 127 measurements were made on over 5,000 fossil dentaries of the Eocene-Oligocene rodent Ischyromys. This was the subject of my Ph.D. dissertation at Harvard University and several subsequent publications.

Ph.D. Thesis on Ischyromys.

Ischyromys of the Great Plains published in the Journal of Paleontology.

Ischyromys of Badlands National Park (Abstract) published in the Proceedings of the South Dakota Academy of Sciences.

Distinguishing Ischyromys and Titanotheriomys (Abstract) published in the Journal of Vertebrate Paleontology.

Ischyromyids of western North America

Requests for reprints can be sent to me by e-mail.

Timothy H. Heaton: E-mail, Home page, Phone (605) 677-6122, FAX (605) 677-6121 .