Eocene shallow-marine ostracods from Madagascar: southern end of the Tethys?

Moriaki Yasuhara; Yuanyuan Hong; Skye Yunshu Tian; Wing Ki Chong; Hisayo Okahashi; Kate Littler; Laura Cotton

doi:10.1080/14772019.2018.1453555

Eocene shallow-marine ostracods from Madagascar: southern end of the Tethys?

Moriaki Yasuhara, Yuanyuan Hong, Skye Yunshu Tian, Wing Ki Chong, Hisayo Okahashi, Kate Littler, Laura Cotton

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

17 Citations (Scopus)

Abstract

Twenty-five genera and 32 species of Eocene shallow-marine ostracods from Madagascar were examined for taxonomy and palaeobiogeography. Eight new species – Paijenborchellina madagascarensis sp. nov., Neocyprideis polygonoreticulata sp. nov., Alciella irizukii sp. nov., Neomonoceratina afroangulosa sp. nov., Muellerina eocenica sp. nov., Stigmatobradleya hunti gen. et sp. nov., Uroleberis paranuda sp. nov., Xestoleberis renemai sp. nov. – and one new genus – Stigmatobradleya gen. nov. – are described. Eocene Malagasy ostracods showed a strong affinity to the Eocene East Tethyan fauna in Arab-Africa and Indo-Pakistan. They also showed certain affinity to the Eocene West Tethyan fauna in Europe. One species, Pokornyella lamarckiana sensu lato, showed a very wide Eocene geographical distribution, covering Europe, Indo-Pakistan, Arab-Africa, Japan and perhaps North America. These results indicate that the East African, Arabian, and Indo-Pakistan regions constitute the East Tethyan palaeobiogeographical sub-realm, with considerable faunal similarity found across the regions. This sub-realm extends to south-eastern Africa in the south and is a part of the broader Tethyan palaeobiogeographical realm with certain, but less, palaeobiogeographical similarity. The spatial extent of the Tethys palaobiogeographical realm sensu lato includes Asia-Oceania in the east and eastern America in the west. Based on our results, we suggest a need to update the scheme of global ostracod biogeographical division. http://zoobank.org/urn:lsid:zoobank.org:pub:C98E65A2-FEB8-4D63-B294-7A1A22C51F5E. © 2018, © The Trustees of the Natural History Museum, London 2018. All rights reserved.

Original language	English
Pages (from-to)	705-757
Number of pages	53
Journal	Journal of Systematic Palaeontology
Volume	17
Issue number	9
DOIs	https://doi.org/10.1080/14772019.2018.1453555
Publication status	Published - 3 May 2019
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

Funding

We thank W. Renema for general support and help in depositing type and figured specimens; M. G. Y. Lo, L. M. Y. Wong, and the staff of the Electron Microscope Unit in the University of Hong Kong for continuous support; H. Iwatani for discussion on ostracod taxonomy; the Département de Paléontologie et d’Anthropologie Biolo-gique, University of Antananarivo, for field assistance, particularly the micropalaeontology laboratory and G. Ramakavelo; and two anonymous reviewers for their comments. The work described in this article was partially supported by grants from the Research Grants Council of the Hong Kong Special Administrative Region, China (project codes: HKU 17303115; HKU 709413P), the Seed Funding Programme for Basic Research of the University of Hong Kong (project code: 201611159053, to MY), NWO (Netherlands Organisation for Scientific Research) grant (project code: ALW 82201 009, to W. Renema), an Arthur J. Boucot research grant from the Paleontological Society (to LC), and the Temminck Fellowship of the Nat-uralis Biodiversity Center (to MY and KL). This is University of Florida Contribution to Paleobiology Paper No. 842.

Research Keywords

Africa
Cenozoic
Crustacea
global palaeobiogeography
Ostracoda
Palaeogene

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title = "Eocene shallow-marine ostracods from Madagascar: southern end of the Tethys?",

abstract = "Twenty-five genera and 32 species of Eocene shallow-marine ostracods from Madagascar were examined for taxonomy and palaeobiogeography. Eight new species – Paijenborchellina madagascarensis sp. nov., Neocyprideis polygonoreticulata sp. nov., Alciella irizukii sp. nov., Neomonoceratina afroangulosa sp. nov., Muellerina eocenica sp. nov., Stigmatobradleya hunti gen. et sp. nov., Uroleberis paranuda sp. nov., Xestoleberis renemai sp. nov. – and one new genus – Stigmatobradleya gen. nov. – are described. Eocene Malagasy ostracods showed a strong affinity to the Eocene East Tethyan fauna in Arab-Africa and Indo-Pakistan. They also showed certain affinity to the Eocene West Tethyan fauna in Europe. One species, Pokornyella lamarckiana sensu lato, showed a very wide Eocene geographical distribution, covering Europe, Indo-Pakistan, Arab-Africa, Japan and perhaps North America. These results indicate that the East African, Arabian, and Indo-Pakistan regions constitute the East Tethyan palaeobiogeographical sub-realm, with considerable faunal similarity found across the regions. This sub-realm extends to south-eastern Africa in the south and is a part of the broader Tethyan palaeobiogeographical realm with certain, but less, palaeobiogeographical similarity. The spatial extent of the Tethys palaobiogeographical realm sensu lato includes Asia-Oceania in the east and eastern America in the west. Based on our results, we suggest a need to update the scheme of global ostracod biogeographical division. http://zoobank.org/urn:lsid:zoobank.org:pub:C98E65A2-FEB8-4D63-B294-7A1A22C51F5E. {\textcopyright} 2018, {\textcopyright} The Trustees of the Natural History Museum, London 2018. All rights reserved.",

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AB - Twenty-five genera and 32 species of Eocene shallow-marine ostracods from Madagascar were examined for taxonomy and palaeobiogeography. Eight new species – Paijenborchellina madagascarensis sp. nov., Neocyprideis polygonoreticulata sp. nov., Alciella irizukii sp. nov., Neomonoceratina afroangulosa sp. nov., Muellerina eocenica sp. nov., Stigmatobradleya hunti gen. et sp. nov., Uroleberis paranuda sp. nov., Xestoleberis renemai sp. nov. – and one new genus – Stigmatobradleya gen. nov. – are described. Eocene Malagasy ostracods showed a strong affinity to the Eocene East Tethyan fauna in Arab-Africa and Indo-Pakistan. They also showed certain affinity to the Eocene West Tethyan fauna in Europe. One species, Pokornyella lamarckiana sensu lato, showed a very wide Eocene geographical distribution, covering Europe, Indo-Pakistan, Arab-Africa, Japan and perhaps North America. These results indicate that the East African, Arabian, and Indo-Pakistan regions constitute the East Tethyan palaeobiogeographical sub-realm, with considerable faunal similarity found across the regions. This sub-realm extends to south-eastern Africa in the south and is a part of the broader Tethyan palaeobiogeographical realm with certain, but less, palaeobiogeographical similarity. The spatial extent of the Tethys palaobiogeographical realm sensu lato includes Asia-Oceania in the east and eastern America in the west. Based on our results, we suggest a need to update the scheme of global ostracod biogeographical division. http://zoobank.org/urn:lsid:zoobank.org:pub:C98E65A2-FEB8-4D63-B294-7A1A22C51F5E. © 2018, © The Trustees of the Natural History Museum, London 2018. All rights reserved.

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Eocene shallow-marine ostracods from Madagascar: southern end of the Tethys?

Abstract

Bibliographical note

Funding

Research Keywords

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