protistus Hirschfeld & Webb, 1968 y los caballos arriba mencionados, permiten asignar una edad NALMA
, Henfiliano Temprano-Tardio (Hh2) a la localidad de San Gerardo de Limoncito.
Calamagras murivorus previously has been reported from the Orellan NALMA (Early Oligocene) of Colorado, Nebraska, and South Dakota (3), thus the Poleslide Member vertebrae extend the temporal range of the species into the Whitneyan NALMA.
Calamagras weigeli was widespread temporally and geographically, previously being reported from the Chadronian NALMA (Late Eocene) of Canada, Arikareean NALMA (Early Miocene) of Wyoming, Hemingfordian NALMA (Early Miocene) of South Dakota, and Barstovian NALMA (Middle Miocene) of Texas (3).
Thus, the fossils described below pertain to the early part of the Pliocene epoch, and the early Blancan NALMA.
Parts of the formation also extend into the Pleistocene, and vertebrate fossils of both Pliocene and Pleistocene age have been collected there, possibly representing three NALMAs.
Along with IGM 9562, associated fossil material includes the lower jaw, skull, and teeth of Equus conversidens as well as isolated molars of Mammuthus and Bison species; the latter suggesting a Rancholabrean NALMA for the faunal association (Montellano-Ballesteros, 2000; Reynoso and Montellano-Ballesteros, 2004).
The faunal association also suggested a Rancholabrean NALMA (Castillo-Ceron et al.
Finally, a late Hemphillian NALMA
age is assumed for this new fossil find and corresponds with the youngest stratigraphic rank for the Gavialosuchus americanus (Sellards, 1915).
Debido a lo anterior se asume una edad NALMA Rancholabreano.
La edad asumida para estos hallazgos es Pleistoceno Superior o edad NALMA Rancholabreana.
wilsoni, which ranges across the Wasatchian and Bridgerian NALMAs of the Bridger, Bighorn, and Green River Basins (Mook 1959; Bartels 1980; 1983; Brochu 1997).
These remains are among the youngest reported for Pristichampsus in North America, which is otherwise best known from the Wasatchian and Bridgerian NALMAs of North America (Troxell 1925; Langston 1975; Golz & Lillegraven 1977; Bartels 1980; Gingerich 1989) and units correlative with the Bridgerian in Europe (Berg 1966; Kuhn 1938; Rauhe & Rossmann 1995; Efimov 1993; Rossmann 1998).