MolluscaBase name details
original description
Melvill, J. C. (1895). Descriptions of four new species of <i>Engina</i> and a new species of <i>Defrancia</i>. <em>Proceedings of the Malacological Society of London.</em> 1: 226-228, pl. 14., available online at https://www.biodiversitylibrary.org/page/15167533
page(s): 227, pl. 14, fig. 11 [details]