MolluscaBase name details
original description
(of Helcionella arguta Resser, 1939 †) Resser, C. E. (1939). The Ptarmigania strata of the northwestern Wasatch Mountains. <em>Smithsonian Miscellaneous Collections.</em> 98(24):1-72. [details]
basis of record
Geyer, G. (1994). Middle Cambrian mollusks from Idaho and early conchiferan evolution. <em>New York State Museum, Bulletin.</em> 481: 69−86, pl. 1.
page(s): 80, fig. 4 A, B [details] Available for editors [request]