Mammalia - Rodentia - Heteromyidae

Alternative combination: Proheteromys magnus

Full reference: A. E. Wood. 1932. Bulletin of the Florida State Geological Survey 10

Belongs to Harrymys according to B. E. Bailey 2004

Sister taxa: Harrymys canadensis, Harrymys irvini, Harrymys woodi

Type specimen: Its type locality is Midway, which is in a Hemingfordian terrestrial horizon in the Torreya Formation of Florida

Ecology: ground dwelling granivore-browser

Average measurements (in mm): m1 1.61 x 1.67