WoRMS taxon details
original description
(of Gryphaea angulata Lamarck, 1819) Lamarck [J.-B. M.] de. (1819). <i>Histoire naturelle des animaux sans vertèbres</i>. Tome 6(1): vi + 343 pp. Paris: published by the author. , available online at http://www.biodiversitylibrary.org/item/47441 page(s): 198 [details]
original description
(of Ostrea complanata Fenaux, 1944) Fenaux A. (1944). Nouvelle espèce d'<i>Ostrea</i> de la Méditerranée.. <i>Bulletin de l'Institut Océanographique 861</i>: 1, pl. 1 fig. 1-2 [details] Available for editors [request]
basis of record
Salvi D. & Mariottini P. (2017 [nomenclatural availability: 2016]). Molecular taxonomy in 2D: a novel ITS2 rRNA sequence-structure approach guides the description of the oysters' subfamily Saccostreinae and the genus <i>Magallana</i> (Bivalvia: Ostreidae). <em>Zoological Journal of the Linnean Society.</em> 179(2): 263-276., available online at https://doi.org/10.1111/zoj.12455 page(s): 5, 9; note: new combitantion herein; Salvi & Mariottini (2016) treat Crassostrea angulata as a synonym of C. gigas but include all Asian Pacific species in Magallana [details]
From editor or global species database
Taxonomy The Portuguese oyster Crassostrea [now Magallana] angulata and the Japanese oyster Crassostrea [now Magallana] gigas were described as distinct species with widely separated geographical origins - southwestern Europe and Japan respectively. In the 1970's C. gigas was introduced to the Atlantic coast of France in order to restore oyster farming affected by a disease of C. angulata, and it became evident that the two species could hybridize (Menzel, 1974, Huvet et al., 2004) and therefore were treated as synonyms (Huber, 2010).
During the recent years, however, several genetic studies based on mitochondrial DNA and microsatellite data have provided evidence that the two taxa are genetically distinct although closely related (see overview in Batista et al. 2005). Particularly, an average of 2.3% difference in CO1 sequence suggests that populations of C. gigas and C. angulata may have diverged several hundred thousand years ago (Hedgecock et al., 2004). Studies involving microsatellite markers have shown that there are low but clear genetic differences between the two taxons. From all recent studies, it seems clear that the European C. angulata was introduced in the XVI or XVIIth century from Taiwan, and can be recognized genetically from C. gigas introduced later from Japan.
Nevertheless the relationship of both taxa in intermediate locations remains to be elucidated. Lapègue et al. (2004) reported characteristic haplotypes of both C. gigas and C. angulata occurred in a population from northern China locally known as C. talienwhanensis Crosse, 1862; this could either mean that both species are distinct but overlap ranges, or that all those haplotypes are to be found in a single, geographically variable species.
Considering this state of the art, C. angulata and C. gigas are listed here separately but qualified as very closely related and still possibly conspecific. [details]
Language | Name | |
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Dutch |
Portugese oester [from synonym] |
[details] |
English |
Portuguese oyster [from synonym] |
[details] |
German |
Portugiesische Auster [from synonym]Greifmuschel [from synonym] |
[details] |
To Barcode of Life (3 barcodes)
To Barcode of Life (338 barcodes) (from synonym Crassostrea angulata (Lamarck, 1819))
To Biodiversity Heritage Library (32 publications) (from synonym Crassostrea angulata (Lamarck, 1819))
To Biodiversity Heritage Library (83 publications) (from synonym Gryphaea angulata Lamarck, 1819)
To Biodiversity Heritage Library (98 publications) (from synonym Ostrea angulata (Lamarck, 1819))
To European Nucleotide Archive, ENA (Crassostrea angulata) (from synonym Crassostrea angulata (Lamarck, 1819))
To European Nucleotide Archive, ENA (Magallana angulata)
To GenBank (137543 nucleotides; 50519 proteins) (from synonym Crassostrea angulata (Lamarck, 1819))
To GenBank (3 nucleotides; 3 proteins)
To PESI (from synonym Crassostrea angulata (Lamarck, 1819))
To PESI (from synonym Gryphaea angulata Lamarck, 1819)
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