Gudeodiscus sp.

Material examined.

Specimens from Ban Naweed village, Viengxay District, Houaphanh Province (Figs 24F, 55D).

Remarks.

This population is very close to Gudeodiscus messageri, but slightly differs in having thicken periostracum. The ribbed protoconch indicates it is a member of the genus Gudeodiscus ( Páll-Gergely pers. comm.).