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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2005
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v42_n2_p419_Guler http://hdl.handle.net/20.500.12110/paper_00027014_v42_n2_p419_Guler |
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paper:paper_00027014_v42_n2_p419_Guler2025-07-30T17:06:25Z New dinoflagellate cyst species from the Calafate Formation (Maastrichtian), Austral Basin, Argentina 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. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v42_n2_p419_Guler 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) |
| 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 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. |
| 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 |
| publishDate |
2005 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v42_n2_p419_Guler http://hdl.handle.net/20.500.12110/paper_00027014_v42_n2_p419_Guler |
| _version_ |
1840326783083216896 |