MolluscaBase name details
original description
Verrill, A. E. (1882). Catalogue of marine Mollusca added to the fauna of the New England region, during the past ten years. <em>Transactions of the Connecticut Academy of Arts and Sciences.</em> 5(2): 447-587, pls 42-44, 57-58 [May-July]., available online at http://biodiversitylibrary.org/page/35718507 [details]
From other sources
Subgenus (Opalia) [details]