'Teinostoma' alexanderi Olsson, 1916 "Alexander Vitrinella"

Scanning Electron Micrographs (SEM)

   Kice Island, Collier County, Florida (1.32 mm.). SEMs produced in collaboration with Dr. Ann Heatherington, Dept. Geological Sciences, University of Florida, Gainesville, FL.

    This is not T. beaufortensis Ward and Blackwelder, 1987. That nominal species as treated by Campbell, 1993: pl. 27, fig. 269 as captioned; fig. 266 is T. beaufortensis; nos. apparently transposed; respective text blocks are correct. The species was previously only known as a fossil in the Plio-Pleistocene of VA and NC (Olsson, 1916: 13-14, pl. 3, figs. 11-13; Campbell, 1993: 60, 132, 141). It is now clearly a member of the Recent fauna as well. Furthermore it appears not to belong to Teinostoma, or even the Tornidae, based on characters of the earliest part of the shell. The involute protoconch suggests the species belongs in the marine Valvatoidea, related to Tomura, e.g., Tomura apextruncata Rubio, Rolán and Fernández-Garcés, 2013.

Campbell, L.D., 1993. Pliocene mollusks from the Yorktown and Chowan River Formations in Virginia. Virginia Division of Mineral Resources Publication 127: 1-259.

Olsson, A.A., 1916. New Miocene fossils. Bulletins of American Paleontology 5(27): [1]-32, pls. <https://www.biodiversitylibrary.org/page/32510720>

Ward, L. W. and B.W. Blackwelder, 1987. Late Pliocene and early Pleistocene Mollusca from the James City and Chowan River Formations at the Lee Creek Mine. Pp. 113-293 in Ray, C.E. [ed.] Geology and Paleontology of the Lee Creek Mine, North Carolina II. Smithsonian Contributions to Paleobiology No. 61: 1-283. <https://www.biodiversitylibrary.org/page/58085640>