Saccostrea, J. Sekino & Yamashita, 2016

Duangdee, Teerapong, , Kitithorn Sanpanich, , Sherralee S. Lukehurst, Wells, & Fred E., 2025, Clarification of the identity of oysters in the genera Magallana and Saccostrea in the upper Gulf of Thailand based on 16 S rRNA sequences, Raffles Bulletin of Zoology 73, pp. 12-33 : 26

Published Saccostrea records in the Gulf of Thailand rejected. There have been numerous reports of S. cuccullata ( Born, 1778) in the Gulf of Thailand, but unfortunately with no DNA sequences presented, it is not clear what species were actually reported. Published Gulf of Thailand records: Ostrea cuccullata Born, 1778 reported by: Lynge, 1909. Saccostrea cuccullata ( Born, 1778) reported by: Amornjaruchit (1988); Nateewathana (1995); Sanpanich (1998, 2011); Aungtonya et al. (1999); Yoosukh & Duangdee (1999); Klinbunga et al. (2000, 2001, 2002, 2003, 2005); Yoosukh (2000); Swennen et al. (2001); Robba et al. (2002); van Gemert (2003); Bussarawit & Simonsen (2006b); Printrakoon et al. (2008); Nabhitabhata (2009); Bussarawit & Cedhagen (2010); Samakraman et al. (2010); Negri et al. (2014).

Saccostrea commercialis ( Iredale & Roughley, 1933) reported by Trivej & Kesjinda (2018) is actually S. glomerata ( Gould, 1850) , but this is a misidentification.

Saccostrea forskahlii ( Gmelin, 1791) . Published Gulf of Thailand records as Saccostrea forskahli : Aungtonya et al. (1999); Klinbunga et al. (2000, 2001, 2005); Bussarawit et al. (2006); Bussawarit & Simonsen (2006b); Kasetsart University (2006); ONEP (2007); Nabhitabhata (2009); Bussarawit & Cedhagen (2010); Sanpanich (2011). As S. forskahlii : Yoosukh & Duangdee (1999). Note: Huber (2010) believes the S. forskahlii reported by Yoosukh & Duangdee (1999) is actually the Melanesian S. circumsuta ( Gould, 1850) . WoRMS considers S. forskahlii to be a synonym of S. cuccullata (MolluscaBase eds., 2024), but it is not clear to which lineage S. forskahlii belongs. There are only two 16S sequences submitted to GenBank under the name S. circumsuta . One matches Lam & Morton (2006) lineage D and the other lineage C.

Striostrea mytiloides ( Lamarck, 1819) was reported in the Gulf of Thailand by Yoosukh & Duangdee (1999) and Klinbunga et al. (2000, 2001, 2005), and Striostrea ( Parastriostrea) mytiloides ( Lamarck, 1819) by Kurozumi et al. (1989). Huber (2010) and WoRMS (MolluscaBase eds., 2024) recorded three other species of Striostrea Vialov, 1936 : S. denticulata ( Born, 1778) from West Africa; S. margaritacea ( Lamarck, 1819) from South Africa and the Western Indian Ocean; and S. prismatica ( Gray, 1825) from the Panamic Province. Huber (2010) believed Ostrea rufa Lamarck, 1819 from the Panamic Province may be a valid Striostrea , but WoRMS classifies it as S. prismatica (MolluscaBase eds., 2024). The Japanese Ostrea circumpicta Pilsbry, 1904 was included in Striostrea by Huber (2010) but was retained in Ostrea by WoRMS (MolluscaBase eds., 2024). Regardless of the final classification of these two species, the genus Striostrea has not been recorded from the Gulf of Thailand. Ostrea mytiloides Lamarck, 1819 is accepted as Saccostrea echinata (Quoy & Gaimard, 1835) by WoRMS (MolluscaBase eds., 2024), but there is no record of the DNA lineage of this species.