MolluscaBase taxon details
original description
Orbigny, A. D. d'. (1850-1852). <i>Prodrome de paléontologie stratigraphique universelle des animaux mollusques et rayonnés, faisant suite au cours élémentaire de paléontologie et de géologie stratigraphiques</i>. Paris: Masson. vol. 1 [January 1850 ("1849")]: lx + 394 pp.; vol. 2 [November 1850]: 427 pp.; vol. 3 [1852]: 196 pp. + Table alphabétique et synonymique des genres et des espèces: 189 pp; addenda, errata, Table of Contents: unpaginated., available online at http://dx.doi.org/10.5962/bhl.title.45605
page(s): Vol. 3, p. 32, n. 448. [details]
original description
(of Turritella variabilis Conrad, 1830 †) Conrad, T. A. (1830). On the geology and organic remains of a part of the peninsula of Maryland; with appendix; containing descriptions of twenty-nine new species of fossil shells, noticed in the preceding paper. <em>Journal of the Academy of Natural Sciences of Philadelphia.</em> 6 (2): 205-230, pls 9-10., available online at https://www.biodiversitylibrary.org/page/24677623
page(s): p. 211, p. 221, n. 2, pl. 10, fig. 3. [details]
additional source
Ward, L. W. (1992). Molluscan biostratigraphy of the Miocene, middle Atlantic coastal plain of North America. <em>Virginia Museum of Natural History Memoir.</em> 2:1-147, 36 figs., 26 pls.
page(s): P. 117. [details]