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IV Jornadas Internacionales Sobre Paleontología De Dinosaurios Y Su Entorno Salas De Los Infantes, Burgos

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IV Jornadas Internacionales Sobre Paleontología De Dinosaurios Y Su Entorno Salas De Los Infantes, Burgos IV Jornadas Internacionales sobre Paleontología de Dinosaurios y su Entorno Salas de los Infantes, Burgos Los fósiles de multituberculados del Hauteriviense y Barremiense de la Península Ibérica Multituberculate fossils from the Hauterivian and Barremian of the Iberian Peninsula Badiola, A., Canudo, I., Cuenca-Bescós, G. Universidad de Zaragoza, Facultad de Ciencias, Dpto. de Ciencias de la Tierra (Área de Paleontología; Grupo Aragosaurus), Cerbuna, 12, 50009 Zaragoza. [email protected]; [email protected]; [email protected] Resumen El Cretácico Inferior es un intervalo clave para interpretar tanto la distribución geográfica como el origen y evolución de la fauna de vertebrados continentales. La ruptura de la masa continental Pangea al final del Jurásico, produjo la aparición de dos supercontinentes, Laurasia al norte y Gondwana al sur, diferenciándose cada vez más sus respectivas faunas. Sin embargo, poco se sabe aún sobre la historia evolutiva y la distribución paleobiogeográfica de los multituberculados a lo largo del Cretácico Inferior. Los fósiles de multituberculados más abundantes y diversos de este periodo provienen de Europa occidental, de los depósitos del Berriasiense de Portugal e Inglaterra y del Barremiense de España. En Inglaterra se han recuperado algunos fósiles del Barremiense, pero su estudio está aún en curso. Los del Valanginiense son escasos y, hasta la fecha, no se disponía de ningún especimen del Hauteriviense inferior. En este trabajo se dan a conocer los nuevos hallazgos de multituberculados del Cretácico Inferior de la Rama Aragonesa de la Cordillera Ibérica, y se pone al día la sistemática y distribución bioestratigráfica de los fósiles de multituberculados de la Península Ibérica. Se describe por primera vez un diente aislado en los depósitos lacustres de la Formación de Villanueva de Huerva, en el yacimiento de Pochancalo-1 (Provincia de Zaragoza), que podría corresponder a un paulchoffatioideo de la familia Albionbaataridae. Se trata del primer multituberculado del Valanginiense- Hauteriviense inferior de Europa. El resto de los fósiles provienen de la provincia de Teruel, localizados en los depósitos continentales y de transición de las Subcuencas de Oliete, Galve y Morella (Cuenca de Maestrazgo). En la Subcuenca de Oliete se localiza el yacimiento de La Cantalera (Formación Blesa), de edad Hauteriviense terminal-Barremiense basal. En la de Galve, se encuentran los yacimientos de Colladico Blanco y Pelejón-2 (Formación El Castellar), de edad Hauteriviense terminal-Barremiense basal, y Cerrada Roya, Herrero y Poca (Formación Camarillas) del Barremiense inferior. En la Subcuenca de Morella se conoce el yacimiento de Vallipón (Formación Artoles), de edad Barremiense superior. La asociación fósil de multituberculados de estos últimos yacimientos consiste en paulchoffatioideos (Pinheirodontidae y Paulchoffatiidae) y plagiaulacoideos (Eobaataridae y posiblemente Plagiaulacidae). La fauna de multituberculados del Cretácico Inferior de la Península Ibérica está compuesta por paulchoffatioideos que únicamente se han registrado en Inglaterra (Paulchoffatiidae, Pinheirodontidae y Albionbaataridae), y de plagiaulacoideos que también se conocen en Inglaterra (Eobaataridae y Plagiaulacidae) y en Asia (Eobaataridae). 47 IV Jornadas Internacionales sobre Paleontología de Dinosaurios y su Entorno Salas de los Infantes, Burgos Palabras clave: Multituberculados, Paulchoffatioideos, Plagiaulacoideos, Cretácico Inferior, Península Ibérica. Abstract The Early Cretaceous is a key period to investigate the geographic distribution and origin and evolution of continental vertebrate faunas. When Pangaea broke up at the end of the Jurassic, significant separation of Laurasia and Gondwana occurred and their respective faunas became more distinct than they had been earlier. However, little is known about the evolutionary history and palaeobiogeographic distribution of multituberculates through the Early Cretaceous. The most abundant and diverse multituberculate fossils of this period are recorded in Western Europe, from the Berriasian of Portugal and England, and from the Barremian of Spain. In England, some Barremian fossils have been found, but their study is still ongoing. Those of Valanginian are scarce and no lower Hauterivian specimens have been described so far. In this paper, new Early Cretaceous multituberculate finds from the Aragonese Branch of the Iberian Ranges are presented, and the systematic and biostratigraphic distribution of multituberculate fossils of the Iberian Peninsula are updated. An isolated tooth has been described for the first time in the lacustrine deposits of the Villanueva de Huerva Formation, in Pochancalo-1 site (Zaragoza Province), which seems to belong to a paulchoffatiioid of the Albionbaataridae family. This is the first early Hauterivian member in Europe. The rest of the fossils come from the province of Teruel, which are located in the continental and transitional deposits of the Oliete, Galve and Morella Subbasins (Maestrazgo Basin). The upper Hauterivian-lowermost Barremian site of La Cantalera (Blesa Formation) is located in the Oliete Subbasin. In that of Galve, the upper Hauterivian-lowermost Barremian sites of Colladico Blanco and Pelejón-2 (El Castellar Formation) and the lower Barremian sites of Cerrada Roya, Herrero and Poca (Camarillas Formation) are situated. In the Morella Subbasin, the upper Barremian site of Vallipón (Artoles Formation) is known. The multituberculate fossil assemblage of these localities consists of paulchoffatiioids (Pinheirodontidae and Paulchoffatiidae) and plagiaulacoids (Eobaataridae and probably Plagiaulacidae). Early Cretaceous multituberculate faunas of the Iberian Peninsula comprise paulchoffatioids, which are only registered in England (Paulchoffatiidae, Pinheirodontidae and Albionbaataridae), and plagiaulacoids, which are also present in England (Plagiaulacoidea and Eobaataridae) and Asia (Eobaataridae). Key words: Multituberculates, paulchoffatioids, plagiaulacoids, Early Cretaceous, Iberian Peninsula. 48.
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