original description (unavailable nomenclaturally)
Settepassi, F.; Verdel, U. (1965). Continental Quaternary mollusca of lower Liri Valley (Southern Latium). <em>Geologica Romana.</em> 4: 369-452.
page(s): 391, fig. 16 [details] Available for editors [request]
From editor or global species database
Status Introduced as variety after 1961 and thus not available as species-group name (ICZN Art. 15.2.). [details]