This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
Corresponding author (Name, Year)
Spisula (Hemimactra) chesapeakensis
Ref.: L. C. Glenn. 1904. Pelecypoda. Maryland Geological Survey Miocene(Text):274-401
Spisula (Hemimactra) curtidens
Ref.: L. W. Ward. 1992. Molluscan biostratigraphy of the Miocene Middle Atlantic Coastal Plain of North America. Virginia Museum of Natural History 2