A NEW DINOFLAGELLATE FROM THE LATE CRETACEOUS OF THE COLORADO BASIN, OFF SHORE ARGENTINA

Authors

  • Eduardo Guillermo Ottone CONICET – Universidad de Buenos Aires. Instituto de Estudios Andinos Don Pablo Groeber (IDEAN). Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Pabellón II Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
  • Juan P. Lovecchio YPF S.A., Gerencia de Exploración Offshore, Av. Macacha Güemes 515, Puerto Madero, C1106BKK Buenos Aires, Argentina
  • Juan P. Pérez-Panera CONICET - Laboratorio de Bioestratigrafía, Gerencia de Geociencias, YPF Tecnología S.A., Avenida del Petróleo Argentino s/n entre 129 y 143, CP 1923, Berisso, Buenos Aires – Cátedra de Micropaleontología, División Paleozoología Invertebrados, Museo de La Plata, Paseo del Bosque s/n, La Plata, CP 1900, Buenos Aires, Argentina
  • Diana Ronchi GEMA SRL - Laboratorio de Bioestratigrafía, Gerencia de Geociencias, YPF Tecnología S.A., Avenida del Petróleo Argentino s/n entre 129 y 143, CP 1923, Berisso, Buenos Aires, Argentina

Keywords:

Organic-walled Peridiniaceae. Late Campanian – early Maastrichtian. Argentine Platform.

Abstract

This paper introduces a new dinoflagellate species from the Late Campanian – early Maastrichtian horizons of the Colorado basin: Andalusiella guersteinii Ottone sp. nov. It is a relatively large, fusiform organic-walled cyst, whose apical horn is longer than its antapical, and has a smooth endophragm that is markedly thicker than the periphragm; a peridinioid paratabulation is suggested by the intercalary 2a hexa iso-deltaform archeopyle, the paracingulum, and the flagellar scar. The age of this new species is determined by associated palynomorphs, foraminifers and nannoplankton, but also by radiometric dating.

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Published

2018-07-26

Issue

Vol. 55 No. 3 (2018)

Section

Paleontological Notes

License

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How to Cite

A NEW DINOFLAGELLATE FROM THE LATE CRETACEOUS OF THE COLORADO BASIN, OFF SHORE ARGENTINA. (2018). Ameghiniana, 55(3), 343–349. https://ameghiniana.org.ar/index.php/ameghiniana/article/view/3129