WoRMS name details

Checked: verified by a taxonomic editorCrassostrea angulata (Lamarck, 1819)

146900  (urn:lsid:marinespecies.org:taxname:146900)

Unaccepted: synonym, or anything that is not accepted unaccepted
Species
marine
(ofChecked: verified by a taxonomic editorGryphaea angulata Lamarck, 1819) Lamarck [J.-B. M.] de. (1819). Histoire naturelle des animaux sans vertèbres. Tome sixième, 1re partie. Paris: published by the Author, vi + 343 pp., available online at http://www.biodiversitylibrary.org/item/47441
page(s): 198 [details]   
Checked: verified by a taxonomic editorNomenclature ICZN opinion 388: placed on official list of...  
Checked: verified by a taxonomic editorNomenclature ICZN opinion 388: placed on official list of specific names  [details]

Checked: verified by a taxonomic editorTaxonomy The Portuguese oyster Crassostrea angulata and...  
Checked: verified by a taxonomic editorTaxonomy The Portuguese oyster Crassostrea angulata and the Japanese oyster Crassostrea 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]
Gofas, S. (2017). Crassostrea angulata (Lamarck, 1819). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=146900 on 2017-12-15

Date
action
by
2005-02-24 10:36:17Z
created
2013-04-17 20:48:02Z
changed
2017-10-10 11:31:15Z
changed

Creative Commons License The webpage text is licensed under a Creative Commons Attribution 4.0 License


original description  (ofChecked: verified by a taxonomic editorGryphaea angulata Lamarck, 1819) Lamarck [J.-B. M.] de. (1819). Histoire naturelle des animaux sans vertèbres. Tome sixième, 1re partie. Paris: published by the Author, vi + 343 pp., available online at http://www.biodiversitylibrary.org/item/47441
page(s): 198 [details]   

basis of record Backeljau, T. (1986). Lijst van de recente mariene mollusken van België [List of the recent marine molluscs of Belgium]. Koninklijk Belgisch Instituut voor Natuurwetenschappen: Brussels, Belgium. 106 pp. (look up in IMIS[details]   

additional source Menzel R.W. (1974). Portuguese and Japanese oysters are the same species. Journal of the Fisheries Research Board of Canada 31: 453-456 [details]   

additional source Fabioux C., Huvet A., Lapègue S., Heurtebise S. & Boudry P. (2002). Past and present geographical distribution of populations of Portuguese (Crassostrea angulata)and Pacific (C. gigas) oysters along the European and north African Atlantic coasts. Haliotis 31: 33-44, available online at http://archimer.ifremer.fr/doc/2002/publication-2785.pdf [details]   

additional source Huvet A., Fabioux C., Mccombie H., Lapegue S & Boudry P. 2004. Natural hybridization between genetically differentiated populations of Crassostrea gigas and C. angulata highlighted by sequence variation in flanking regions of a microsatellite locus. Marine Ecology Progress Series, 272: 141-152., available online at http://archimer.ifremer.fr/doc/00000/3355/ [details]   

additional source Lapegue S., Batista F.M., Heurtebise S., Yu Z. & Boudry P. 2004. Evidence for the presence of the Portuguese oyster, Crassostrea angulata, in northern China. Journal of Shellfish Research, 23(3): 759-763. , available online at http://biodiversitylibrary.org/page/3062368 [details]   

additional source Batista F., Leitão A., Huvet A., Lapegue S., Heurtebise S. & Boudry P. 2005. The taxonomic status and origin of the Portuguese oyster Crassostrea angulata (Lamarck, 1819). in:Proceedings, 1st International Oyster Symposium, Tokyo, Japan, July 13-14. Oyster Research Institute News, 18: 6pp. unpaginated., available online at http://www.worldoyster.org/proceeding_pdf/news_18-1e.pdf [details]   

basis of record  (ofChecked: verified by a taxonomic editorGryphaea angulata Lamarck, 1819) Huber, M. (2010). Compendium of bivalves. A full-color guide to 3,300 of the world’s marine bivalves. A status on Bivalvia after 250 years of research. Hackenheim: ConchBooks. 901 pp., 1 CD-ROM. (look up in IMIS[details]   

basis of record  (ofChecked: verified by a taxonomic editorOstrea complanata Fenaux, 1944) Huber, M. (2010). Compendium of bivalves. A full-color guide to 3,300 of the world’s marine bivalves. A status on Bivalvia after 250 years of research. Hackenheim: ConchBooks. 901 pp., 1 CD-ROM. (look up in IMIS[details]   

basis of record  (ofChecked: verified by a taxonomic editorOstrea virginica var. lusitanica Osorio, 1916) Huber, M. (2010). Compendium of bivalves. A full-color guide to 3,300 of the world’s marine bivalves. A status on Bivalvia after 250 years of research. Hackenheim: ConchBooks. 901 pp., 1 CD-ROM. (look up in IMIS[details]   

context source (HKRMS) Lam K. & Morton B. (2004). The oysters of Hong Kong (Bivalvia: Ostreidae and Gryphaeidae). The Raffles Bulletin of Zoology 52. pp 11-28. [details]   

context source (Schelde) Van Ryckegem, G.; Van Braeckel, A.; Elsen, R.; Speybroeck, J.; Vandevoorde, B.; Mertens, W.; Breine, J.; Van den Bergh, E. (2014). MONEOS – Geïntegreerd datarapport: INBO: toestand Zeeschelde 2013 Monitoringsoverzicht en 1ste lijnsrapportage Geomorfologie, diversiteit Habitats en diversiteit Soorten. Rapporten van het Instituut voor Natuur- en Bosonderzoek, INBO.R.2014.2646963. Instituut voor Natuur- en Bosonderzoek (INBO): Brussel. 137 pp. (look up in IMIS[details]   
 
 Present  Inaccurate  Introduced: alien 
 

From editor or global species database
Checked: verified by a taxonomic editorNomenclature ICZN opinion 388: placed on official list of specific names  [details]

Checked: verified by a taxonomic editorTaxonomy The Portuguese oyster Crassostrea angulata and the Japanese oyster Crassostrea 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]
 

LanguageName 
Dutch Unreviewed: has not been verified by a taxonomic editorPortugese oester  [details]