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Taxonomy
Eumarcia (Atamarcia) was named by Marwick (1927) [Sepkoski's age data: T Ol-l T Plio-u Sepkoski's reference number: 728,899]. Its type is Eumarcia (Atamarcia) sulcifera.
It was reranked as Atamarcia by Sepkoski (2002).
It was assigned to Eumarcia by Marwick (1927), Beu et al. (1990); and to Veneroida by Sepkoski (2002).
It was reranked as Atamarcia by Sepkoski (2002).
It was assigned to Eumarcia by Marwick (1927), Beu et al. (1990); and to Veneroida by Sepkoski (2002).
Subtaxa
Species lacking formal opinion data