Circulus liratus (A. E. Verrill, 1882) Lirate Vitrinella

    Although synonymized with Cyclostremiscus pentagonus (Gabb, 1873) by Abbott (1974), this species is quite distinct and, among Carolinian species, it more closely resembles juvenile Cyclostremiscus beauii (P. Fischer, 1857) but has a generally smaller shell, consistently smaller protoconch, proportionately wider umbilicus, fewer spirals on its base, flatter profile, and tighter coil. A. E. Verrill (1882: 529) did not illustrate this species; Spencer and Campbell (1987) and Lyons (1989: 8; plate 11: figs. 7a, 7b) correctly interpret it. Recent range RI (type locality) to St. Lucie Co., FL (Lyons, 1989) and the Pleistocene of VA (Spencer and Campbell, 1987). Quite similar to the E. Atlantic Circulus striatus (Philippi, 1836), type of Circulus Jeffreys, 1867, but is higher and less carinate in profile. Vitrinella semisculpta Olsson and McGinty, 1958 has fewer spirals and a less exposed umbilicus. Vitrinella mooreana Vanatta, 1903 (perhaps better placed in Solariorbis), described from Bay (“Calhoun”) Co., FL and known from there, Antigua, and Brazil (Lee Collection), is a more strongly sculptured shell with a nearly smooth base, constricted umbilicus, and thickened columellar lip. [Slight paraphrase of Lee (2009: 65; species no. 309)].

Partial bibliography:
Abbott, R. T., 1974. American seashells. Second edition. Van Nostrand Reinhold Co., New York, pp. 1-663 incl. numerous text figs. + 24 pls.
Lee, H. G., 2009. Marine shells of northeast Florida. Jacksonville Shell Club, Jacksonville, FL. Pp. 204 + 19 color pls. 28 May.
Lyons, W. G., 1989.  Nearshore marine ecology at Hutchinson Is., Florida: 1971-1974 XI. Mollusks. Florida Marine Research Publications 47: iii + 1-131 incl. 28 pls.
Olsson, A.A. and T. L. McGinty, 1958. Recent marine mollusks from the Caribbean coast of Panama with the description of some new genera and species. Bull. Amer. Paleont. 39(177): 1-58.
Spencer, R. S. and L. D. Campbell, 1987. The fauna and paleoecology of the Late Pleistocene marine sediments of southeastern Virginia. Bull. Amer. Paleont. 92(327): 1-124.
Vanatta, E. G. 1904. A list of shells collected in western Florida and Horn Island, Mississippi. Proceedings of the Academy of Natural Sciences of Philadelphia 55: 756-759. 15 Jan.
Verrill, A. E. 1882 Catalogue of marine Mollusca added to the fauna of the New England region, during the past ten years. Transactions of the Connecticut Academy of Arts and   Sciences 5: 451-587, pls. 42-44, 57-58.

Also see:  Cyclostremiscus beauii (P. Fischer, 1857) Beau’s Vitrinella

Circulus liratus (A. E. Verrill, 1882) Lirate Vitrinella

Ft. Fisher, Kure Beach, North Carolina (about 2 mm.) | Digital images by David Kirsh