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Abstract:

The aim of this paper is to erect four new dinoflagellate cyst species from the Maastrichtian Calafate Formation, Austral Basin, Argentina. Andalusiella spinosa sp. nov. is strongly acrocavate and possesses a periphragm covered with spines. Palaeocystodinium pilatum sp. nov. has a periphragm densely covered with fine, flexuous, hair-like projections, shortening towards the end of the horns, and a finely granulate endophragm. The large peridinialean Caligodinium perforatum sp. nov. shows the hypocystal archeopyle typical for the genus, with a simple triplacoid opercular piece and a microfoveolate autophragm surrounded by a perforate flocculent calyptra. Hafniasphaera australis sp. nov. is differentiated from other species of the genus Hafniasphaera by the presence of a distinctive anterior ventral process which emerges at the junction of paraplates 1′, 4′ and as. These new species characterize the assemblages from deposits related to the South Atlantic transgression that occurred during Maastrichtian times at the southermost part of Argentina. © Asociación Paleontológica Argentina.

Registro:

Documento: Artículo
Título:New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina
Autor:Guler, M.V.; Guerstein, G.R.; Casadío, S.
Filiación:Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
Departamento de Geología, Universidad Nacional del sur, San Juan 670, 8000 Bahía Blanca, Argentina
Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Uruguay 151, 6300 Santa Rosa, Argentina
Idioma: Inglés
Palabras clave:Argentina; Austral Basin; Calafate Formation; Dinoflagellate cysts; Maastrichtian; Cretaceous; dinoflagellate cyst; microfacies; new species; Argentina; South America; Western Hemisphere; World; Andalusiella; Andalusiella spinosa; Caligodinium perforatum; Calyptra; Dinophyceae; Hafniasphaera; Hafniasphaera australis; Palaeocystodinium pilatum; Peridiniales
Año:2005
Volumen:42
Número:2
Página de inicio:419
Página de fin:428
Título revista:Ameghiniana
Título revista abreviado:Ameghiniana
ISSN:00027014
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v42_n2_p419_Guler

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Citas:

---------- APA ----------
Guler, M.V., Guerstein, G.R. & Casadío, S. (2005) . New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina. Ameghiniana, 42(2), 419-428.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v42_n2_p419_Guler [ ]
---------- CHICAGO ----------
Guler, M.V., Guerstein, G.R., Casadío, S. "New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina" . Ameghiniana 42, no. 2 (2005) : 419-428.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v42_n2_p419_Guler [ ]
---------- MLA ----------
Guler, M.V., Guerstein, G.R., Casadío, S. "New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina" . Ameghiniana, vol. 42, no. 2, 2005, pp. 419-428.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v42_n2_p419_Guler [ ]
---------- VANCOUVER ----------
Guler, M.V., Guerstein, G.R., Casadío, S. New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina. Ameghiniana. 2005;42(2):419-428.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v42_n2_p419_Guler [ ]