Revisiting Early Jurassic Biscutaceae: Similiscutum giganteum sp. nov.

A large, broadly elliptical coccolith of the genus Similiscutum (Biscutaceae) was observed in sediments dated from the Lower Jurassic (upper Pliensbachian to Toarcian) coming from different localities of western Tethys, namely Portugal (Lusitanian Basin), France (Causses and Paris basins) and Spain...

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Autores principales: Mailliot, Samuel, Mattioli, Emanuela, Chaumeil Rodriguez, Micaela, Pittet, Bernard
Formato: Articulo
Lenguaje:Inglés
Publicado: 2023
Materias:
Paleontología
Biscutaceae
Jurásico Inferior
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/152509
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-152509
record_format dspace
spelling I19-R120-10915-1525092023-05-06T04:07:10Z http://sedici.unlp.edu.ar/handle/10915/152509 issn:2041-4978 Revisiting Early Jurassic Biscutaceae: Similiscutum giganteum sp. nov. Mailliot, Samuel Mattioli, Emanuela Chaumeil Rodriguez, Micaela Pittet, Bernard 2023-03 2023-05-05T14:44:06Z en Paleontología Biscutaceae Jurásico Inferior A large, broadly elliptical coccolith of the genus Similiscutum (Biscutaceae) was observed in sediments dated from the Lower Jurassic (upper Pliensbachian to Toarcian) coming from different localities of western Tethys, namely Portugal (Lusitanian Basin), France (Causses and Paris basins) and Spain (Subbetic area). This form is quite easy to find in the Toarcian GSSP (Global Stratotype Section and Point) of Peniche (Portugal), where the holotype has been described. More than 100 specimens of Similiscutum were digitally captured using a CCD camera, including this large form and two other related species, Similiscutum finchii and Similiscutum novum. The length and width of the coccoliths and the length and width of their central area were measured, and biometric analyses were performed. Results show that this large morphotype of Similiscutum is well characterized and easily differentiable by its size and morphology from the species S. finchii and S. novum, which are characterized by a similar extinction pattern in optical-microscope crossed polars . On the basis of combined differences in size and in central-area shape and structure, Similiscutum giganteum sp. nov. is introduced here. (Plant Fossil Names Registry no.: PFN003067; Act LSID: urn:lsid:plantfossilnames.org:act:3067). Facultad de Ciencias Naturales y Museo Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Biscutaceae
Jurásico Inferior
spellingShingle Paleontología
Biscutaceae
Jurásico Inferior
Mailliot, Samuel
Mattioli, Emanuela
Chaumeil Rodriguez, Micaela
Pittet, Bernard
Revisiting Early Jurassic Biscutaceae: Similiscutum giganteum sp. nov.
topic_facet Paleontología
Biscutaceae
Jurásico Inferior
description A large, broadly elliptical coccolith of the genus Similiscutum (Biscutaceae) was observed in sediments dated from the Lower Jurassic (upper Pliensbachian to Toarcian) coming from different localities of western Tethys, namely Portugal (Lusitanian Basin), France (Causses and Paris basins) and Spain (Subbetic area). This form is quite easy to find in the Toarcian GSSP (Global Stratotype Section and Point) of Peniche (Portugal), where the holotype has been described. More than 100 specimens of Similiscutum were digitally captured using a CCD camera, including this large form and two other related species, Similiscutum finchii and Similiscutum novum. The length and width of the coccoliths and the length and width of their central area were measured, and biometric analyses were performed. Results show that this large morphotype of Similiscutum is well characterized and easily differentiable by its size and morphology from the species S. finchii and S. novum, which are characterized by a similar extinction pattern in optical-microscope crossed polars . On the basis of combined differences in size and in central-area shape and structure, Similiscutum giganteum sp. nov. is introduced here. (Plant Fossil Names Registry no.: PFN003067; Act LSID: urn:lsid:plantfossilnames.org:act:3067).
format Articulo
Articulo
author Mailliot, Samuel
Mattioli, Emanuela
Chaumeil Rodriguez, Micaela
Pittet, Bernard
author_facet Mailliot, Samuel
Mattioli, Emanuela
Chaumeil Rodriguez, Micaela
Pittet, Bernard
author_sort Mailliot, Samuel
title Revisiting Early Jurassic Biscutaceae: Similiscutum giganteum sp. nov.
title_short Revisiting Early Jurassic Biscutaceae: Similiscutum giganteum sp. nov.
title_full Revisiting Early Jurassic Biscutaceae: Similiscutum giganteum sp. nov.
title_fullStr Revisiting Early Jurassic Biscutaceae: Similiscutum giganteum sp. nov.
title_full_unstemmed Revisiting Early Jurassic Biscutaceae: Similiscutum giganteum sp. nov.
title_sort revisiting early jurassic biscutaceae: similiscutum giganteum sp. nov.
publishDate 2023
url http://sedici.unlp.edu.ar/handle/10915/152509
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AT mattioliemanuela revisitingearlyjurassicbiscutaceaesimiliscutumgiganteumspnov
AT chaumeilrodriguezmicaela revisitingearlyjurassicbiscutaceaesimiliscutumgiganteumspnov
AT pittetbernard revisitingearlyjurassicbiscutaceaesimiliscutumgiganteumspnov
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