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Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae)

The diversity of native oysters in many regions is overshadowed by the global dominance of a few economically important species. Here we describe the Muar Oyster, Crassostrea (Magallana) saidii sp. nov., first reported as an established local fishery renowned for exceptional and distinctive flavour...

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Main Authors: Sigwart, Julia D., Wong, Nur Leena Wai Sin, Esa, Yuzine
Format: Article
Language:English
Published: Springer 2021
Online Access:http://psasir.upm.edu.my/id/eprint/97449/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/97449/
https://link.springer.com/article/10.1007/s12526-021-01203-x
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spelling my.upm.eprints.974492022-07-27T07:24:53Z http://psasir.upm.edu.my/id/eprint/97449/ Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae) Sigwart, Julia D. Wong, Nur Leena Wai Sin Esa, Yuzine The diversity of native oysters in many regions is overshadowed by the global dominance of a few economically important species. Here we describe the Muar Oyster, Crassostrea (Magallana) saidii sp. nov., first reported as an established local fishery renowned for exceptional and distinctive flavour over 160 years ago by British colonial officials in Malaysia, but as yet never formally named or described as a species. This new species has a subtle but clear morphological diagnosis dependent on three-dimensional characters, which has long been recognised by local fishers to differentiate the new species from co-occurring C. (M.) belcheri (G. B. Sowerby II, 1871). The Indo-Pacific clade Magallana Salvi & Mariottini, 2016 in Salvi and Mariottini 2017 is a phylogenetically distinct group that nonetheless cannot be morphologically separated from the broader genus Crassostrea Sacco, 1897. Fossils or species known only from shell specimens, though morphologically distinct species, cannot be classified as Magallana, Talonostrea Li & Qi, 1994, or Crassostrea s.s.; therefore, we revise these groups as sub-genera within Crassostrea. Our analysis of the COI barcoding fragment from previously published sequences of all available Magallana species found that gene is not sufficient to separate several economically important species, and revealed more than 5% of sequences in GenBank represent identification errors. The new species Crassostrea (Magallana) saidii sp. nov., which is genetically, morphologically, and gastronomically distinct, is known from only one population under potential threat from urbanisation. Many more global species of Magallana remain undescribed. The systematics of this group is critical to understand the diversity of global oysters, and to understand the sustainable use of species grown worldwide for centuries as our food. Springer 2021 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/97449/1/ABSTRACT.pdf Sigwart, Julia D. and Wong, Nur Leena Wai Sin and Esa, Yuzine (2021) Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae). Marine Biodiversity, 51. art. no. 83. pp. 1-16. ISSN 1867-1616; ESSN: 1867-1624 https://link.springer.com/article/10.1007/s12526-021-01203-x 10.1007/s12526-021-01203-x
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description The diversity of native oysters in many regions is overshadowed by the global dominance of a few economically important species. Here we describe the Muar Oyster, Crassostrea (Magallana) saidii sp. nov., first reported as an established local fishery renowned for exceptional and distinctive flavour over 160 years ago by British colonial officials in Malaysia, but as yet never formally named or described as a species. This new species has a subtle but clear morphological diagnosis dependent on three-dimensional characters, which has long been recognised by local fishers to differentiate the new species from co-occurring C. (M.) belcheri (G. B. Sowerby II, 1871). The Indo-Pacific clade Magallana Salvi & Mariottini, 2016 in Salvi and Mariottini 2017 is a phylogenetically distinct group that nonetheless cannot be morphologically separated from the broader genus Crassostrea Sacco, 1897. Fossils or species known only from shell specimens, though morphologically distinct species, cannot be classified as Magallana, Talonostrea Li & Qi, 1994, or Crassostrea s.s.; therefore, we revise these groups as sub-genera within Crassostrea. Our analysis of the COI barcoding fragment from previously published sequences of all available Magallana species found that gene is not sufficient to separate several economically important species, and revealed more than 5% of sequences in GenBank represent identification errors. The new species Crassostrea (Magallana) saidii sp. nov., which is genetically, morphologically, and gastronomically distinct, is known from only one population under potential threat from urbanisation. Many more global species of Magallana remain undescribed. The systematics of this group is critical to understand the diversity of global oysters, and to understand the sustainable use of species grown worldwide for centuries as our food.
format Article
author Sigwart, Julia D.
Wong, Nur Leena Wai Sin
Esa, Yuzine
spellingShingle Sigwart, Julia D.
Wong, Nur Leena Wai Sin
Esa, Yuzine
Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae)
author_facet Sigwart, Julia D.
Wong, Nur Leena Wai Sin
Esa, Yuzine
author_sort Sigwart, Julia D.
title Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae)
title_short Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae)
title_full Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae)
title_fullStr Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae)
title_full_unstemmed Global controversy in oyster systematics and a newly described species from SE Asia (Bivalvia: Ostreidae: Crassostreinae)
title_sort global controversy in oyster systematics and a newly described species from se asia (bivalvia: ostreidae: crassostreinae)
publisher Springer
publishDate 2021
url http://psasir.upm.edu.my/id/eprint/97449/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/97449/
https://link.springer.com/article/10.1007/s12526-021-01203-x
_version_ 1739829900277186560
score 13.211869

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