Diario de pintail

It was believed that Sinanodonta woodiana and Anemica arcaeformis lived in the surrounding rice fields. Anemica arcaeformis thought to be fatter than Sinanodonta woodiana.

https://cafe.naver.com/yangpakor/1999

However, recent comparisons of mtDNA show that they are all one species. And what's more confusing is not exactly what species it is.

In Korea, China, and Japan, the species Sinanodonta woodiana and Anemica arcaeformis appear to be completely different. Yes, when you look at the data on the NCBI.

https://cafe.naver.com/yangpakor/35942

Clearance of these two species is needed and research requires a record of the new species.