original description(ofCylichna villica A. Gould, 1859)Gould, A. A. (1859). Descriptions of new species of shells brought home by the North Pacific Exploring Expedition. <em>Proceedings of the Boston Society of Natural History.</em> 7: 138-142., available online athttp://biodiversitylibrary.org/page/9249698 page(s): 139. [details]
basis of recordOskars T.R., Bouchet P. & Malaquias M.A. (2015). A new phylogeny of the Cephalaspidea (Gastropoda: Heterobranchia) based on expanded taxon sampling and gene markers. <em>Molecular Phylogenetics and Evolution.</em> 89: 130-150., available online athttps://doi.org/10.1016/j.ympev.2015.04.011[details]
Present Inaccurate Introduced: alien Containing type locality