ABSTRACT-In North America, the ammonoid Uraloceras Ruzhentsev occurs in Cisuralian (Lower Permian) strata of the
 northern Yukon Territory, eastern Alaska, Ellesmere Island, southern British Columbia, and Nevada.  From Sakmarian to
 Kungurian, species of  Uraloceras occupied a narrow belt in the Northern Hemisphere (Boreal paleogeographical realm)
 that extended from the northern and northwestern margin of the Pangaean superecontinent southward to regions of
 present-day Siberia, the Ural Mountains, as well as Nei Monggol and Tibet.  In the Yukon Territory, Nevada, Nei Monggol,
 and possibly Tibet, the association of Uraloceras with typically equatorial peninitid ammonoids may represent a transition
 from "Boreal" occurrences in high latitudes to "Tethyan" of lower latitudes. Uraloceras nevadense n. sp. is described
 herein from Nevada md eastern Alaska.