MolluscaBase taxon details
original description
(of Turricula (Knefastia) nigricans Dall, 1919) Dall, W. H. (1919). Descriptions of new species of mollusks of the family Turritidae from the west coast of America and adjacent regions. <em>Proceedings of the United States National Museum.</em> 56 (2288): 1-86, pls 1-24., available online at https://biodiversitylibrary.org/page/7765993
page(s): 3, pl. 2, fig. 6. [details]
basis of record
Abbott, R. T. (1974). <i>American seashells. The marine Mollusca of the Atlantic and Pacific coast of North America</i>. ed. 2. Van Nostrand, New York. 663 pp., 24 pls. [October 1974]. (look up in IMIS)
page(s): 264 [details]