Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera
We describe Globigerinoides rublobatus n. sp., a new morphospecies of fossil planktonic foraminifera, from the Pleistocene sediments ( ∼810 ka) of the Indian Ocean and Pacific Ocean. We use image analysis and morphometry of 860 specimens from International Ocean Discovery Program Site U1483 in the t...
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ftcopernicus:oai:publications.copernicus.org:jm107872 2023-08-15T12:42:50+02:00 Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera Latas, Marcin Pearson, Paul N. Poole, Christopher R. Fabbrini, Alessio Wade, Bridget S. 2023-07-17 application/pdf https://doi.org/10.5194/jm-42-57-2023 https://jm.copernicus.org/articles/42/57/2023/ eng eng doi:10.5194/jm-42-57-2023 https://jm.copernicus.org/articles/42/57/2023/ eISSN: 2041-4978 Text 2023 ftcopernicus https://doi.org/10.5194/jm-42-57-2023 2023-07-24T16:24:18Z We describe Globigerinoides rublobatus n. sp., a new morphospecies of fossil planktonic foraminifera, from the Pleistocene sediments ( ∼810 ka) of the Indian Ocean and Pacific Ocean. We use image analysis and morphometry of 860 specimens from International Ocean Discovery Program Site U1483 in the tropical Indian Ocean to document morphological variability in the new morphospecies and related taxa, and we also report it from Pacific Ocean Site U1486 for the first time. The new morphospecies combines characteristics typical of Globigerinoides conglobatus (Brady, 1879) and Globigerinoides ruber (d'Orbigny, 1839), with which it co-occurs, but is distinct from both. Morphometric data indicate that G. rublobatus n. sp. is closer to G. conglobatus , potentially signalling an evolutionary affinity. We find that Globigerinoides rublobatus n. sp. occurs as two variants, a pigmented (pink) form and a non-pigmented (white) form. The non-pigmented forms are on average ∼50 % larger than the pigmented forms. This is so far only the third instance of fossil planktonic foraminifera known to exhibit this pink pigmentation. We regard the pink and white forms as variants of a single morphospecies and suggest the pink form may represent a later evolutionary adaptation. Text Planktonic foraminifera Copernicus Publications: E-Journals Indian Pacific Journal of Micropalaeontology 42 2 57 81 |
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Copernicus Publications: E-Journals |
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English |
description |
We describe Globigerinoides rublobatus n. sp., a new morphospecies of fossil planktonic foraminifera, from the Pleistocene sediments ( ∼810 ka) of the Indian Ocean and Pacific Ocean. We use image analysis and morphometry of 860 specimens from International Ocean Discovery Program Site U1483 in the tropical Indian Ocean to document morphological variability in the new morphospecies and related taxa, and we also report it from Pacific Ocean Site U1486 for the first time. The new morphospecies combines characteristics typical of Globigerinoides conglobatus (Brady, 1879) and Globigerinoides ruber (d'Orbigny, 1839), with which it co-occurs, but is distinct from both. Morphometric data indicate that G. rublobatus n. sp. is closer to G. conglobatus , potentially signalling an evolutionary affinity. We find that Globigerinoides rublobatus n. sp. occurs as two variants, a pigmented (pink) form and a non-pigmented (white) form. The non-pigmented forms are on average ∼50 % larger than the pigmented forms. This is so far only the third instance of fossil planktonic foraminifera known to exhibit this pink pigmentation. We regard the pink and white forms as variants of a single morphospecies and suggest the pink form may represent a later evolutionary adaptation. |
format |
Text |
author |
Latas, Marcin Pearson, Paul N. Poole, Christopher R. Fabbrini, Alessio Wade, Bridget S. |
spellingShingle |
Latas, Marcin Pearson, Paul N. Poole, Christopher R. Fabbrini, Alessio Wade, Bridget S. Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera |
author_facet |
Latas, Marcin Pearson, Paul N. Poole, Christopher R. Fabbrini, Alessio Wade, Bridget S. |
author_sort |
Latas, Marcin |
title |
Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera |
title_short |
Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera |
title_full |
Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera |
title_fullStr |
Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera |
title_full_unstemmed |
Globigerinoides rublobatus – a new species of Pleistocene planktonic foraminifera |
title_sort |
globigerinoides rublobatus – a new species of pleistocene planktonic foraminifera |
publishDate |
2023 |
url |
https://doi.org/10.5194/jm-42-57-2023 https://jm.copernicus.org/articles/42/57/2023/ |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
eISSN: 2041-4978 |
op_relation |
doi:10.5194/jm-42-57-2023 https://jm.copernicus.org/articles/42/57/2023/ |
op_doi |
https://doi.org/10.5194/jm-42-57-2023 |
container_title |
Journal of Micropalaeontology |
container_volume |
42 |
container_issue |
2 |
container_start_page |
57 |
op_container_end_page |
81 |
_version_ |
1774297525375729664 |