Globorotalia archeomenardii Bolli 1957
Globorotalia archeomenardii Bolli, 1957 Pl. 7, figs. 4a–c Globorotalia archeomenardii Bolli, 1957, p. 119, pl. 28, fig. 11; Bolli et al., 1985, p. 223, pl. 32, fig. 6; Kender et al., 2008, p. 521. Description : The wall surface is smooth and macroperforate. The test has a keeled margin, is compresse...
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2022
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Online Access: | https://dx.doi.org/10.5281/zenodo.5842074 https://zenodo.org/record/5842074 |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Biodiversity Taxonomy Chromista Foraminifera Globothalamea Rotaliida Globorotaliidae Globorotalia Globorotalia archeomenardii |
spellingShingle |
Biodiversity Taxonomy Chromista Foraminifera Globothalamea Rotaliida Globorotaliidae Globorotalia Globorotalia archeomenardii Bergh, Eugene W. Compton, John S. Globorotalia archeomenardii Bolli 1957 |
topic_facet |
Biodiversity Taxonomy Chromista Foraminifera Globothalamea Rotaliida Globorotaliidae Globorotalia Globorotalia archeomenardii |
description |
Globorotalia archeomenardii Bolli, 1957 Pl. 7, figs. 4a–c Globorotalia archeomenardii Bolli, 1957, p. 119, pl. 28, fig. 11; Bolli et al., 1985, p. 223, pl. 32, fig. 6; Kender et al., 2008, p. 521. Description : The wall surface is smooth and macroperforate. The test has a keeled margin, is compressed, unequally biconvex, with up to five crescent-shaped chambers visible on the umbilical side, rapidly increasing toward the apertural end. The chambers increase in size toward the terminal end. Earlier chambers are slightly pustulose on the umbilical side opposite the apertural opening. The sutures are depressed, oblique, radial and slightly curved. The aperture is an extra-umbilical slit. Remarks: Specimens of G. archeomenardii are not very abundant and only occur as trace in some of the samples. The tests are moderate in size, measuring 0.4 mm in width and 0.65 mm in length. This species is placed within the Globorotalia menardii group or ‘ Menardella’ lineage and identified as G. archeomenardii based on its keeled margin, chamber arrangement, outline and test structure. G. archeomenardii differs from its descendent G. praemenardii in being smaller and has a more biconvex outline in side view and equatorial section. Its spiral side is also more curved. This species differs from G. menardii in generally being smaller, more lobate and having a less developed or thinner keel (Kennett & Srinivasan, 1983). G. menardii is more rounded in outline and has more chambers in its last whorl, usually up to six or six and a half. G. archeomenardii is considered to have evolved from Globorotalia praescitula in tropical conditions during the early Miocene (Kennett & Srinivasan, 1983). Global stratigraphic range: This species has been recorded to occur in the Miocene from the Burdigalian to the Serravalian (Kennett & Srinivasan, 1983; Wade et al., 2011; BouDagher-Fadel, 2015). Environmental preferences: G. archeomenardii is recorded to occur in subtropical to tropical waters (BouDagher-Fadel, 2015). Regional occurrence : This species occurs in middle Miocene strata from the Congo Basin (Kender et al ., 2008) to the outer continental shelf of Namibia, south of the Kunene River mouth (this study). : Published as part of Bergh, Eugene W. & Compton, John S., 2022, Taxonomy of Middle Miocene foraminifera from the northern Namibian continental shelf, pp. 1-55 in Zootaxa 5091 (1) on pages 30-31, DOI: 10.11646/zootaxa.5091.1.1, http://zenodo.org/record/5840434 : {"references": ["Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (1985) Plankton Stratigraphy. Cambridge University Press, Cambridge, 1032 pp.", "Kender, S., Kaminski, M. A. & Jones, R. W. (2008) Early to middle Miocene foraminifera from the deep-sea Congo Fan, offshore Angola. Micropalaeontology, 54, 477 - 568.", "Kennett, J. P. & Srinivasan, M. S. (1983) Neogene Planktonic Foraminifera. A Phylogenetic Atlas. Hutchinson Ross, Stroudsburg, 265 pp.", "Wade, B. S., Pearson, P. N., Berggren, W. A. & Palike, H. (2011) Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews, 104, 111 - 142. https: // doi. org / 10.1016 / j. earscirev. 2010.09.003", "BouDagher-Fadel, M. K. (2015) Biostratigraphic and geological significance of planktonic foraminifera. UCL Press, London, 306 pp. https: // doi. org / 10.2307 / j. ctt 1 g 69 xwk"]} |
format |
Text |
author |
Bergh, Eugene W. Compton, John S. |
author_facet |
Bergh, Eugene W. Compton, John S. |
author_sort |
Bergh, Eugene W. |
title |
Globorotalia archeomenardii Bolli 1957 |
title_short |
Globorotalia archeomenardii Bolli 1957 |
title_full |
Globorotalia archeomenardii Bolli 1957 |
title_fullStr |
Globorotalia archeomenardii Bolli 1957 |
title_full_unstemmed |
Globorotalia archeomenardii Bolli 1957 |
title_sort |
globorotalia archeomenardii bolli 1957 |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://dx.doi.org/10.5281/zenodo.5842074 https://zenodo.org/record/5842074 |
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ENVELOPE(-65.167,-65.167,-67.117,-67.117) ENVELOPE(-45.316,-45.316,-60.700,-60.700) |
geographic |
Kennett Saunders |
geographic_facet |
Kennett Saunders |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
http://zenodo.org/record/5840434 http://publication.plazi.org/id/E54EFFC2FFD3932E7F5E9B0CFFC4FF88 http://zoobank.org/ABC8AF70-F691-4D07-8F20-70934642C8BC https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.5091.1.1 http://zenodo.org/record/5840434 http://publication.plazi.org/id/E54EFFC2FFD3932E7F5E9B0CFFC4FF88 http://zoobank.org/ABC8AF70-F691-4D07-8F20-70934642C8BC https://dx.doi.org/10.5281/zenodo.5842073 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.5842074 https://doi.org/10.11646/zootaxa.5091.1.1 https://doi.org/10.5281/zenodo.5842073 |
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ftdatacite:10.5281/zenodo.5842074 2023-05-15T18:00:58+02:00 Globorotalia archeomenardii Bolli 1957 Bergh, Eugene W. Compton, John S. 2022 https://dx.doi.org/10.5281/zenodo.5842074 https://zenodo.org/record/5842074 unknown Zenodo http://zenodo.org/record/5840434 http://publication.plazi.org/id/E54EFFC2FFD3932E7F5E9B0CFFC4FF88 http://zoobank.org/ABC8AF70-F691-4D07-8F20-70934642C8BC https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.5091.1.1 http://zenodo.org/record/5840434 http://publication.plazi.org/id/E54EFFC2FFD3932E7F5E9B0CFFC4FF88 http://zoobank.org/ABC8AF70-F691-4D07-8F20-70934642C8BC https://dx.doi.org/10.5281/zenodo.5842073 https://zenodo.org/communities/biosyslit Open Access info:eu-repo/semantics/openAccess Biodiversity Taxonomy Chromista Foraminifera Globothalamea Rotaliida Globorotaliidae Globorotalia Globorotalia archeomenardii Taxonomic treatment article-journal Text ScholarlyArticle 2022 ftdatacite https://doi.org/10.5281/zenodo.5842074 https://doi.org/10.11646/zootaxa.5091.1.1 https://doi.org/10.5281/zenodo.5842073 2022-02-09T12:10:25Z Globorotalia archeomenardii Bolli, 1957 Pl. 7, figs. 4a–c Globorotalia archeomenardii Bolli, 1957, p. 119, pl. 28, fig. 11; Bolli et al., 1985, p. 223, pl. 32, fig. 6; Kender et al., 2008, p. 521. Description : The wall surface is smooth and macroperforate. The test has a keeled margin, is compressed, unequally biconvex, with up to five crescent-shaped chambers visible on the umbilical side, rapidly increasing toward the apertural end. The chambers increase in size toward the terminal end. Earlier chambers are slightly pustulose on the umbilical side opposite the apertural opening. The sutures are depressed, oblique, radial and slightly curved. The aperture is an extra-umbilical slit. Remarks: Specimens of G. archeomenardii are not very abundant and only occur as trace in some of the samples. The tests are moderate in size, measuring 0.4 mm in width and 0.65 mm in length. This species is placed within the Globorotalia menardii group or ‘ Menardella’ lineage and identified as G. archeomenardii based on its keeled margin, chamber arrangement, outline and test structure. G. archeomenardii differs from its descendent G. praemenardii in being smaller and has a more biconvex outline in side view and equatorial section. Its spiral side is also more curved. This species differs from G. menardii in generally being smaller, more lobate and having a less developed or thinner keel (Kennett & Srinivasan, 1983). G. menardii is more rounded in outline and has more chambers in its last whorl, usually up to six or six and a half. G. archeomenardii is considered to have evolved from Globorotalia praescitula in tropical conditions during the early Miocene (Kennett & Srinivasan, 1983). Global stratigraphic range: This species has been recorded to occur in the Miocene from the Burdigalian to the Serravalian (Kennett & Srinivasan, 1983; Wade et al., 2011; BouDagher-Fadel, 2015). Environmental preferences: G. archeomenardii is recorded to occur in subtropical to tropical waters (BouDagher-Fadel, 2015). Regional occurrence : This species occurs in middle Miocene strata from the Congo Basin (Kender et al ., 2008) to the outer continental shelf of Namibia, south of the Kunene River mouth (this study). : Published as part of Bergh, Eugene W. & Compton, John S., 2022, Taxonomy of Middle Miocene foraminifera from the northern Namibian continental shelf, pp. 1-55 in Zootaxa 5091 (1) on pages 30-31, DOI: 10.11646/zootaxa.5091.1.1, http://zenodo.org/record/5840434 : {"references": ["Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (1985) Plankton Stratigraphy. Cambridge University Press, Cambridge, 1032 pp.", "Kender, S., Kaminski, M. A. & Jones, R. W. (2008) Early to middle Miocene foraminifera from the deep-sea Congo Fan, offshore Angola. Micropalaeontology, 54, 477 - 568.", "Kennett, J. P. & Srinivasan, M. S. (1983) Neogene Planktonic Foraminifera. A Phylogenetic Atlas. Hutchinson Ross, Stroudsburg, 265 pp.", "Wade, B. S., Pearson, P. N., Berggren, W. A. & Palike, H. (2011) Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews, 104, 111 - 142. https: // doi. org / 10.1016 / j. earscirev. 2010.09.003", "BouDagher-Fadel, M. K. (2015) Biostratigraphic and geological significance of planktonic foraminifera. UCL Press, London, 306 pp. https: // doi. org / 10.2307 / j. ctt 1 g 69 xwk"]} Text Planktonic foraminifera DataCite Metadata Store (German National Library of Science and Technology) Kennett ENVELOPE(-65.167,-65.167,-67.117,-67.117) Saunders ENVELOPE(-45.316,-45.316,-60.700,-60.700) |