New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina

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...

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Autores principales: Guler, M.V., Guerstein, G.R., Casadío, S.
Formato: JOUR
Lenguaje:English
Materias:
Argentina
Austral Basin
Calafate Formation
Dinoflagellate cysts
Maastrichtian
Cretaceous
dinoflagellate cyst
microfacies
new species
South America
Western Hemisphere
World
Andalusiella
Andalusiella spinosa
Caligodinium perforatum
Calyptra
Dinophyceae
Hafniasphaera
Hafniasphaera australis
Palaeocystodinium pilatum
Peridiniales
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00027014_v42_n2_p419_Guler
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00027014_v42_n2_p419_Guler
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spelling todo:paper_00027014_v42_n2_p419_Guler2023-10-03T13:52:55Z New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina Guler, M.V. Guerstein, G.R. Casadío, S. 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 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. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027014_v42_n2_p419_Guler
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language English
orig_language_str_mv English
topic 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
spellingShingle 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
Guler, M.V.
Guerstein, G.R.
Casadío, S.
New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina
topic_facet 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
description 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.
format JOUR
author Guler, M.V.
Guerstein, G.R.
Casadío, S.
author_facet Guler, M.V.
Guerstein, G.R.
Casadío, S.
author_sort Guler, M.V.
title New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina
title_short New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina
title_full New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina
title_fullStr New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina
title_full_unstemmed New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina
title_sort new dinoflagellate cyst species from the calafate formation (maastrichtian), austral basin, argentina
url http://hdl.handle.net/20.500.12110/paper_00027014_v42_n2_p419_Guler
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