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Upper Cretaceous-Paleocene echinoids from northern Patagonia, Argentina

Sara Graciela Parma and Silvio Casadio
Upper Cretaceous-Paleocene echinoids from northern Patagonia, Argentina
Journal of Paleontology (November 2005) 79 (6): 1072-1087


Echinoids are among the most conspicuous and diverse constituents of the Upper Cretaceous and Paleocene marine invertebrate fauna of Argentina. Nine species were collected from localities exposing the Jaguel (Maastrichtian), Roca (Maastrichtian- Danian), Salamanca (Danian), Arroyo Barbudo (Danian), El Fuerte (Danian), and Arroyo Salado (Danian) Formations in northern Patagonia, Argentina. Only one of these taxa, Paraster joannisboehmi (Oppenheim in Bohm, 1903), has been described previously from Argentina. Four taxa, Gauthieria menuthiae (Lambert and Savin in Lambert and Thiery, 1911), Nucleopygus pullatus (Stoliczka, 1873), Diplodetus nutrix (Lambert in Boule, 1899), and Hemiaster hawkinsi Lambert, 1933, have been described previously from Madagascar. One species, Micropsis desori (Cotteau in Leymerie and Cotteau, 1856), has been described previously from France. One taxon, Pygopistes parrasae is a new species. Argentinian cassiduloids include the only two known Danian species of Nucleopygus and Pygopistes: The spatangoids were not strongly affected by the K-T extinction event. Comparisons of the Patagonian echinoids with those of the Northern Hemisphere indicate that they were strongly influenced by dispersal from Tethyan sources.

ISSN: 0022-3360
EISSN: 1937-2337
Serial Title: Journal of Paleontology
Serial Volume: 79
Serial Issue: 6
Title: Upper Cretaceous-Paleocene echinoids from northern Patagonia, Argentina
Affiliation: Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Buenos Aires, Argentina
Pages: 1072-1087
Published: 200511
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 108
Accession Number: 2005-074526
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
S42°00'00" - S35°00'00", W70°00'00" - W65°00'00"
Secondary Affiliation: Universidad Nacional de la Pampa, URY, Uruguay
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200544
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