Registro fósil de la Formación Bajo de la Carpa (Cretácico superior) en el Área natural protegida de Paso Córdoba (Río Negro, Argentina): implicancias paleoecológicas y paleobiológicas e inferencias paleoambientales

• Main Author: Fischer, Geraldine
• Other Authors: De Valais, Silvina, Cónsole-Gonella, Carlos
• Language: Spanish
• Published: 2022
• Subjects: Paleontología; Icnología; Paleontología de vertebrados; Paleosuelos; Cuenca neuquina; Formación Bajo de la Carpa; Río Negro (Argentina); Cretácico superior; Argentina; Burrows; Roca; Antarc*
• Online Access: http://rid.unrn.edu.ar/handle/20.500.12049/8650; https://hdl.handle.net/20.500.12049/8650

Fil: Fischer, Geraldine. Universidad Nacional de Río Negro. Licenciatura en Paleontología. Río Nego. Argentina. The Natural Protected Area "Paso Córdoba" (ANPPC) is located at 15 km from General Roca city, province of Río Negro, Argentina, and has aroused scientific interest since the beginning of the last century, with the discovery of the first dinosaur in the area, Antarctosaurus wichmannianus von Huene, 1929. The Mesozoic of ANPPC is represented by three formations belonging to the Neuquén Basin: Bajo de la Carpa (Santonian), Anacleto (middle-lower Campanian), and Allen (upper Campanian-lower Maastrichtian). The Cretaceous continental tetrapod record of these units is notable, highlighting the herpetological repertoire of Bajo de la Carpa Formation, particularly in the region known as “Cañadón de los Cocodrilos” (CDC). To date, this record consists of theropods, snakes, and crocodiles. Despite the previous knowledge, there are no integrative contributions that seek to understand the composition and variability in space, time, and environmental context of this paleofauna. This final degree thesis (TFG) intends to review the vertebrate paleofauna registered at the CDC with an integrating and multidisciplinary perspective, which main objective is to contribut to the knowledge of the paleoecological, paleobiological, and paleoenvironmental context of this area. The components of the paleofauna and the paleoedaphological characteristics of the CDC deposits represent a very interesting case. First of all, the abundance and diversity of the fossil remains is remarkable, particularly the fossil traces of roots and complex structures identified as burrows. One type of them resembles the specimens of the ichnogenus Camborygma isp., associated with freshwater crayfish, while the others correspond to specimens of Daimonelix isp., identified as burrows used for nesting or reproduction of small mammals and reptiles. These ichnotaxons, as well as the burrows, reflect specific behaviors related to the characteristics of ...