MACNBR 00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
A NEW EARLY DANIAN GASTROPOD ASSEMBLAGE FROM NORTHERN PATAGONIA (RÍO NEGRO PROVINCE, ARGENTINA)
Autor/es:
DEL RIO, CLAUDIA JULIA
Revista:
JOURNAL OF PALEONTOLOGY
Editorial:
PALEONTOLOGICAL SOC INC
Referencias:
Año: 2011
ISSN:
0022-3360
Resumen:
A new Early Danian gastropod assemblage contained in the Roca Formation (Río Negro Province) was analyzed. Eleven species were described and illustrated, the new genus Rocalaria has been created, and six new species were recognized: Gyroscala daniana, Heteroterma carmeloi, Microfulgur concheyroae, Sulcobuccinum prominens, Cidarina lenzaniyeuensis, and Rocalaria alani. The present research includes the first mention of Sulcobuccinum dOrbigny, 1850, Priscoficus Conrad, 1866, Cavoscala Whitfield,1892, Microfulgur Finlay and Marwick, 1937, and Cidarina Dall, 1909, for the Danian of Southern South America, the new record of Austrophaera Furque and Camacho, 1949, Fusinus Rafinesque, 1815 and Heteroterma Gabb, 1869 in northern Patagonia, and the oldest Paleogene record for the genus Gyroscala de Boury, 1887. The presence of the study assemblage in Northern Patagonia indicates a more complex paleobiogeographic pattern for the area than previously thought, as shown by the record of endemic genera, cosmopolitan taxa, elements with Tethyan/ Indo-Pacific affinities, and genera related with Wangaloan faunas of the Paleocene of New Zealand.
