Revisiting Early Jurassic Biscutaceae: <i>Similiscutum giganteum</i> sp. nov.
<p>A large, broadly elliptical coccolith of the genus <i>Similiscutum</i> (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...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-03-01
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| Series: | Journal of Micropalaeontology |
| Online Access: | https://jm.copernicus.org/articles/42/1/2023/jm-42-1-2023.pdf |
| _version_ | 1827999270545915904 |
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| author | S. Mailliot E. Mattioli E. Mattioli M. Chaumeil Rodríguez M. Chaumeil Rodríguez M. Chaumeil Rodríguez B. Pittet |
| author_facet | S. Mailliot E. Mattioli E. Mattioli M. Chaumeil Rodríguez M. Chaumeil Rodríguez M. Chaumeil Rodríguez B. Pittet |
| author_sort | S. Mailliot |
| collection | DOAJ |
| description | <p>A large, broadly elliptical coccolith of the genus <i>Similiscutum</i> (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 <i>Similiscutum</i> were digitally captured using a CCD camera, including
this large form and two other related species, <i>Similiscutum finchii</i> and <i>Similiscutum novum</i>. 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 <i>Similiscutum</i> is well characterized and easily differentiable by its size
and morphology from the species <i>S. finchii </i>and<i> S. novum</i>, 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,
<i>Similiscutum giganteum</i> sp. nov. is introduced here. (Plant Fossil Names Registry no.: PFN003067;
Act LSID: urn:lsid:plantfossilnames.org:act:3067).</p> |
| first_indexed | 2024-04-10T05:57:03Z |
| format | Article |
| id | doaj.art-28d0f0a90bbc4b098b6984487e0f5024 |
| institution | Directory Open Access Journal |
| issn | 0262-821X 2041-4978 |
| language | English |
| last_indexed | 2024-04-10T05:57:03Z |
| publishDate | 2023-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Journal of Micropalaeontology |
| spelling | doaj.art-28d0f0a90bbc4b098b6984487e0f50242023-03-03T11:48:14ZengCopernicus PublicationsJournal of Micropalaeontology0262-821X2041-49782023-03-014211210.5194/jm-42-1-2023Revisiting Early Jurassic Biscutaceae: <i>Similiscutum giganteum</i> sp. nov.S. Mailliot0E. Mattioli1E. Mattioli2M. Chaumeil Rodríguez3M. Chaumeil Rodríguez4M. Chaumeil Rodríguez5B. Pittet6Univ Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne, FranceUniv Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne, FranceInstitut Universitaire de France (IUF), Paris, FranceUniv Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne, FranceDivisión Geología, Museo de La Plata, FCNYM, UNLP, La Plata, Buenos Aires, ArgentinaYPF TECNOLOGÍA S.A., Laboratorio de Bioestratigrafía, Buenos Aires, ArgentinaUniv Lyon, UCBL, ENSL, UJM, CNRS, LGL-TPE, 69622, Villeurbanne, France<p>A large, broadly elliptical coccolith of the genus <i>Similiscutum</i> (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 <i>Similiscutum</i> were digitally captured using a CCD camera, including this large form and two other related species, <i>Similiscutum finchii</i> and <i>Similiscutum novum</i>. 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 <i>Similiscutum</i> is well characterized and easily differentiable by its size and morphology from the species <i>S. finchii </i>and<i> S. novum</i>, 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, <i>Similiscutum giganteum</i> sp. nov. is introduced here. (Plant Fossil Names Registry no.: PFN003067; Act LSID: urn:lsid:plantfossilnames.org:act:3067).</p>https://jm.copernicus.org/articles/42/1/2023/jm-42-1-2023.pdf |
| spellingShingle | S. Mailliot E. Mattioli E. Mattioli M. Chaumeil Rodríguez M. Chaumeil Rodríguez M. Chaumeil Rodríguez B. Pittet Revisiting Early Jurassic Biscutaceae: <i>Similiscutum giganteum</i> sp. nov. Journal of Micropalaeontology |
| title | Revisiting Early Jurassic Biscutaceae: <i>Similiscutum giganteum</i> sp. nov. |
| title_full | Revisiting Early Jurassic Biscutaceae: <i>Similiscutum giganteum</i> sp. nov. |
| title_fullStr | Revisiting Early Jurassic Biscutaceae: <i>Similiscutum giganteum</i> sp. nov. |
| title_full_unstemmed | Revisiting Early Jurassic Biscutaceae: <i>Similiscutum giganteum</i> sp. nov. |
| title_short | Revisiting Early Jurassic Biscutaceae: <i>Similiscutum giganteum</i> sp. nov. |
| title_sort | revisiting early jurassic biscutaceae i similiscutum giganteum i sp nov |
| url | https://jm.copernicus.org/articles/42/1/2023/jm-42-1-2023.pdf |
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