Early Cretaceous dinoflagellate cysts from the southern border of the Neuquén Basin, Estancia Santa Elena locality, Argentina*

Abstract

An assemblage of dinoflagellate cysts is re�orted from the Lo�er Member (Pilmatu�� Member) of the An assemblage of dinoflagellate cysts is re�orted from the Lo�er Member (Pilmatu�� Member) of the Agrio Formation (late Valanginian-Hauterivian) of the southern Neuqu��n Basin, Argentina. Thirty s�ecies are recognized and the ne� s�ecies Oligosphaeridium quattrocchioae and Muderongia sarjeantii described. The studied assemblage is com�ared �ith other Early Cretaceous assemblages from central �estern Argentina, Patagonia, the South Atlantic Malvinas Plateau, the Antarctic Peninsula and Australia. The marine dinoflagellate cyst assemblage of the Agrio Formation at the Estancia Santa Elena locality has cosmo�olitan character, �ith a �redominance of Euro�ean and Tethyan s�ecies.

Catálogo de ejemplares tipo de las Colecciones Paleontológicas del Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), Mendoza, Argentina

“…Paratipo: MPLP 9041 A4/14C:26.2/94.9 (Volkheimer, 2010). Localidad tipo: Estancia Santa Elena, ruta provincial nº 66, provincia de Neuquén, Argentina.…”

“…Holotipo: MPLP 9041 A4/4C: 32.5/104.4 (Volkheimer, 2010: P. 239;Figura 4.E). Paratipo: MPLP 9041 A4/2H:15.1/93.1 (Volkheimer, 2010 Género Gelasinicysta Head, 1992 Gelasinicysta? cuyanensis Zavattieri & Prámparo, 2006 (Figura 4A) Diagnosis (Zavattieri & Prámparo, 2006;p.…”

Early Cretaceous Dinoflagellate Cysts From the Neuquén and Austral Basins: A Review

“…in general terms, dinoflagellate cyst assemblages from the Pilmatué Member (Peralta, 1997;Volkheimer, 2010;Paolillo et al, 2015) australia (e.g., Morgan, 1980;Helby et al, 1987;Backhouse, 2006) and new Zealand (e.g., wilson, 1984), reflecting open marine connections among the southernmost part of South america, antarctic Peninsula, australia and new Zealand (Fig. 5.3).…”

“…in southernmost South america, dinoflagellate cysts have contributed to elucidate biostratigraphic and palaeobiogeographic aspects in the austral Basin (e.g., Palamarczuk et al, 2000a,b;guler et al, 2003;guler and archangelsky, 2006) and the neuquén Basin (e.g., Peralta, 1997;Volkheimer, 2010;guler et al, 2013), the two most important oil-producing basins from argentina and chile.…”

Palinología Del Meso-Cenozoico en Argentina. Volumen en Homenaje a Mirta Elena Quattrocchio

“…Organic-walled marine dinoflagellate cysts have offered valuable bioestratigraphic information for the lower cretaceous Basins from the Boreal (e.g., Prössl, 1990;williams et al, 1990;Harding, 1990;nør-Hansen, 1993) and Mediterranean realms (e.g., leereveld, 1997a,b;Torricelli, 2000), as well as in the Southern Hemisphere in australia (Helby et al, 1987;Oosting et al, 2006) and antartica (riding and crame 2002). in southernmost South america, dinoflagellate cysts have contributed to elucidate biostratigraphic and palaeobiogeographic aspects in the austral Basin (e.g., Palamarczuk et al, 2000a,b;guler et al, 2003;guler and archangelsky, 2006) and the neuquén Basin (e.g., Peralta, 1997;Volkheimer, 2010;guler et al, 2013), the two most important oil-producing basins from argentina and chile.…”