Primera ictiofauna marina del Cretácico Superior (Formación Jaguel, Maastrichtiano) de la provincia de Río Negro, Argentina

BOGAN, SERGIO; AGNOLIN, FEDERICO

PAPéIS AVULSOS DE ZOOLOGIA.

Universidade Sao Paulo

Año: 2010 p. 175 - 188

0031-1049

First marine ichthyofauna from the Upper Cretaceous (Jaguel Formation; Maastrichtian) fromRío Negro province, Argentina. This paper describes several fossil teeth coming from marinesediments from the Bajo Trapalcó locality, Río Negro province, Patagonia, Argentina. Theichthyofauna described here is composed by six different chondrichtyan taxa (Serratolamnaserrata, Squalicorax pristodontus, Cretalamna appendiculata, Carcharias sp., Odontaspis sp.and cf. Pseudohypolophus mcnultyi) and two Teleostei of the genus Enchodus (aff. E. feroxand aff. E. gladiolus). Serratolamna serrata is the most abundant species, and it represents thesouthernmost record for the species and the first record for Argentina. The records of Enchodus,Squalicorax pristodontus and cf. Pseudohypolophus mcnultyi, constitute the first mention forthese taxa in Argentina. The taxa described here characterize the paleoichthyofaunas of the UpperCretaceous seas from different regions of the world, contributing with new information towardthe comprehension of the Mesozoic ichthyofunas from the southern regions of South America.