Identification:
Large-sized clam, thick shell, nearly round but irregular. The anterior end is round, and the posterior end is slightly elongated, forming a rounded point. The dorsal margin is curved, the anterior margin is smoothly rounded, and the ventral margin is curved. The outer shell surface is smooth, yellowish-brown, with coarse growth lines. The nacre is white with iridescent colors.
Biology and Ecology:
Lives in sandy-mud bottoms of rivers.
Distribution:
- Vietnam: Tuyen Quang and Phu Tho provinces (Lo River – Viet Tri).
- Global: Thailand.
Value:
Has food value; the shell is used to make buttons and as nacre inlay material.
Conservation Status:
Currently, there is a lack of information on population size and distribution.
IUCN Red List Status:
Data Deficient (DD).
Conservation Measures:
Included in the Vietnam Red Book and the list of protected species by the Fisheries sector since before 1996. Recommendations: Conduct surveys and further research on the distribution and population size of this species in the rivers of Tuyen Quang and Phu Tho provinces.