Sobre la herpetofauna paleógena de algunos yacimientos el N del Duero (Zamora)

Abstract

The Paleogene (Lower to Middle Eocene) fossiliferous deposits of Zamora (Spain) yield a riche fauna of reptiles that shows some differences from place to place. Towards the north of the present-day Duero River only a species of Neochelyis aff. arenarum Broin appears. Sedimentological analysis revealed that this species lived in lacustrine realm where two types of gisements were formed: accumulations of disjointed remains in deltaic channels and accumulations of well-preserved remains, including many complete skeletons, in ephemeral channels tilled up with sediments transported in mass. Inmature individuals are abundant and more frequent than adults. Towards the north, no carettochelyids were found, they seem to be replaced by scarce trionychids. With respects to crocodilians, only some remains of Fiplocynodon appear.