Galapagos Species Database

Shell pupoid oblong with the two last whorls larger than the others; six or seven apertural barriers: angular-parietal, infraparietal and columellar lamellae and basal, lower-palatal, interpalatal (sometimes absent) and upper-palatal folds. Shell pupoid, oblong, rimate, 4.5 convex whorls last two largest, with growth lines. Peristome rounded in the area that comprises the columellar lamella and the lower-palatal fold, flattened in the upperpalatal area; few small grouped conical pustules on the lip, rounded and larger pustules inside the aperture; six or seven apertural barriers. Angular and parietal lamellae jointed as a bifid lamella with a slight groove between them; angular lamella small, slightly rounded, not extended posteriorly; parietal lamella rounded, more prolonged posteriorly; infraparietal lamella like a callus; columellar lamella semicircular, horizontal; basal fold rounded, like a tubercle; lower-palatal fold semicircular, slightly prolonged posteriorly; interpalatal fold like a small callus (sometimes absent); upper-palatal fold rounded, like a tubercle. Barriers formula: [ap + ip + c] l + [b + lp + irp/0 + up] f. (Miquel & Brito, 2019).