New Data on the Biogeography of the Permian Ammonoid Family Perrinitidae

Abstract

The biogeographical distribution of the ammonoid family Perrinitidae Miller and Furnish, 1940 is revised in connection with the first record of the ammonoid genus Properrinites Elias, 1938 in the Urals. The possible distribution pathways of this group, previously thought to be typically equatorial, are discussed. A migration scheme is proposed, according to which perrinitids migrated from their center of origin to the central region of the Tethys Ocean, and from there to the western and eastern regions of the Tethyan Realm and the Uralian Paleobasin.