Galapagos Species Database

Shell cylindrical to pupoid-conic, rimate, 5.25–5.50 convex whorls, with growth lines. Peristome rounded, slightly flattened in columellar area; ten or eleven apertural barriers. Angular and parietal lamellae joined as a bifid lamella; angular lamella curved towards upperpalatal fold; parietal lamella prolonged posteriorly, curved to the columellar lamella; strong nodule behind angular-parietal lamella; infraparietal lamella strong, parallel to angular-parietal lamella; supracolumellar lamella rounded, tubercular, with an expanded wall, sometimes absent; columellar lamella semicircular, horizontal, wall slightly expanded; subcolumellar lamella rounded, strong, oriented toward basal fold; supernumerary fold, small, like a callus; basal fold semicircular, prolonged posteriorly; infrapalatal fold small, not very prolonged; lower-palatal fold semicircular, strong, prolonged posteriorly; interpalatal and upperpalatal folds semicircular, slightly prolonged posteriorly; suprapalatal fold rounded, tubercular, developed near peristome, sometimes absent. Barriers formula: [ap(nd) + ip + spc/0 + c + sc] l + [sn + b + iap + lp + irp + up/0 + sp/0] f. (Miquel & Brito, 2019).