Magallana, Salvi & Mariottini, 2016

Published Magallana View in CoL records in the Gulf of Thailand rejected. Saccostrea dactylena ( Iredale, 1939) was reported by van Gemert (2003) from Ko Samui in the southern Gulf of Thailand. Saxostrea commercialis dactylena Iredale, 1939 was described as an ecomorph from a specimen collected at Lindeman Island, Great Barrier Reef, Queensland. The species is accepted as valid by WoRMS (MolluscaBase eds., 2024) and is included in the genus Magallana . Van Gemert (2003) simply lists S. dactylena without a description or photograph. As there are no validated records from the Gulf of Thailand, the record is rejected.

Magallana gigas ( Thunberg, 1793) View in CoL was reported as Crassostrea gigas ( Thunberg, 1793) View in CoL by Aungtonya et al. (1999), Swennen et al. (2001), Robba et al. (2002), Printrakoon et al. (2008), and Sanpanich (2011). This is the Pacific oyster that has been widely introduced for aquaculture ( Botta et al., 2020). It has also been reported from Singapore, but Tan et al. (2024) conducted a detailed investigation of intertidal oysters in Singapore and concluded the Singapore records of M. gigas View in CoL were based on outdated taxonomy and the species is not present in Singapore. Similarly, the DNA sequences obtained for Magallana View in CoL for the present paper were all M. belcheri View in CoL and M. bilineata View in CoL ; M. gigas View in CoL was not recorded.

Magallana rivularis ( Gould, 1861) was reported as Ostrea rivularis Gould, 1861 by Lynge (1909). This species is considered a taxon inquirendum by WoRMS (MolluscaBase eds., 2024). Photographs of the Lynge specimens were obtained from the Natural History Museum of Denmark but were unidentifiable fragments.