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WoRMS taxon details

Checked: verified by a taxonomic editorCrassostrea angulata (Lamarck, 1819) 
AphiaID: 146900

Classification: Biota > Checked: verified by a taxonomic editorAnimalia (Kingdom) > Checked: verified by a taxonomic editorMollusca (Phylum) > Checked: verified by a taxonomic editorBivalvia (Class) > Checked: verified by a taxonomic editorPteriomorphia (Subclass) > Checked: verified by a taxonomic editorOstreoida (Order) > Checked: verified by a taxonomic editorOstreoidea (Superfamily) > Checked: verified by a taxonomic editorOstreidae (Family) > Checked: verified by a taxonomic editorCrassostreinae (Subfamily) > Checked: verified by a taxonomic editorCrassostrea (Genus)
Status accepted
Rank Species
Parent Checked: verified by a taxonomic editorCrassostrea Sacco, 1897
Synonymised
names
  Checked: verified by a taxonomic editorGryphaea angulata Lamarck, 1819 (original combination)
Checked: verified by a taxonomic editorOstrea angulata (Lamarck, 1819)
Checked: verified by a taxonomic editorOstrea complanata Fenaux, 1944
Checked: verified by a taxonomic editorOstrea virginica var. lusitanica Osorio, 1916
Sources 
source of synonymy Menzel R.W. (1974). Portuguese and Japanese oysters are the same species. Journal of the Fisheries Research Board of Canada 31: 453-456 [details]

[show all]
Vernacular
Names
 
Language   Name 
Dutch Unreviewed: has not been verified by a taxonomic editorPortugese oester  [details]
Environment marine
Distribution 
From other sources
Belgium
Unreviewed: has not been verified by a taxonomic editorZeebrugge [details]
North Sea
Unreviewed: has not been verified by a taxonomic editorGerman Bight (introduced: alien[details]
(no group)
Unreviewed: has not been verified by a taxonomic editorAtlantic Europe (introduced: alien[details]
Links Unreviewed: has not been verified by a taxonomic editorDelivering Alien Invasive Species Inventories for Europe (DAISIE) 
Unreviewed: has not been verified by a taxonomic editorTo Barcode of Life (16 barcodes) 
Unreviewed: has not been verified by a taxonomic editorTo Biodiversity Heritage Library (32 publications) 
Unreviewed: has not been verified by a taxonomic editorTo GenBank (80991 nucleotides; 144 proteins) 
Unreviewed: has not been verified by a taxonomic editorTo PESI 
Unreviewed: has not been verified by a taxonomic editorTo ITIS
Notes 
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]

From other sources
Unreviewed: has not been verified by a taxonomic editorSynonymy Until recently Crassostrea gigas and Crassostrea angulata were taken as two different species. According to Menzel (1974), Mathers et al. (1974), Buroker et al. (1979) and Thirot-Quievreux (1984) this is no longer tenable. [details]
Images Unreviewed: has not been verified by a taxonomic editor[show unreviewed]
LSID urn:lsid:marinespecies.org:taxname:146900
Taxonomic
Edit history
 
Date   action   by
2005-02-24 10:36:17Z  created  Claus, Simon
2013-04-17 20:48:02Z  changed  Gofas, Serge
  
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  Citation: Gofas, S. (2014). Crassostrea angulata (Lamarck, 1819). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=146900 on 2014-09-21
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