Thanks, David. Here are some references that might help in identifying species of Chesapecten: Ward, Lauck W., 1992, Molluscan biostratigraphy of the Miocene, Middle Atlantic Coastal Plain of North America: Martinsville, Virginia Museum of Natural History, Memoir no. 2, 159 pp., 26 pl. (Chesapecten: p. 68-73, pl. 2, 57, 11, 14-16, 18, 20.) Ward, L. W., and Blackwelder, B. W., 1975, Chesapecten, a new genus of Pectinidae (Mollusca: Bivalvia) from the Miocene and Pliocene of eastern North America: U.S. Geological Survey, Professional Paper 861, 24 pp. ____1987, Upper Pliocene and lower Pleistocene mollusks of the Lee Creek Mine, Aurora, North Carolina. In Ray, C. E., ed., Geology and paleontology of the Lee Creek Mine, North Carolina, II. Smithsonian Contributions to Paleobiology, no. 61, p. 113-283, 47 pl. Although Ward claimed in his 1992 paper to have named a new subgenus Chesapecten within the preexisting genus Chesapecten Ward & Blackwelder, 1975 (p. 68), this was an error. Whenever a genus is named for the first time, a 'virtual' subgenus of the same name is considered to have been automatically erected, whether it is ever used or not, so the subgenus Chesapecten must be credited to Ward & Blackwelder, 1975. Be that as it may, this is a good moment to reflect on the peculiar and amusing method of naming genera by eliding two words together. Chesapecten derives from Chesapeake [Bay] and Pecten, and these fossil scallops are indeed common in the cliffs along the western shore. Andrew K. Rindsberg Geological Survey of Alabama