original description(ofPhenacolimax (Madeirovitrina) portosantanus Groh & Hemmen, 1986 †)Groh, K. & Hemmen, J. (1986). Zur Kenntnis der Vitriniden des Madeira-Archipels (Pulmonata: Vitrinidae). Archiv für Molluskenkunde, 116 [1985] (4/6): 183-217. Frankfurt am Main. page(s): 190-191, pl. 4, fig. 11 [details]
Present Inaccurate Introduced: alien Containing type locality