Galapagos Species Database

Shell pupoid, slightly enlarged, rimate, 4.5 convex whorls, with growth lines. Peristome oval, reflected, with scattered quadrangular pustulae in the inner surface of the aperture, conic and clustered, eight apertural barriers. Angular and parietal lamellae jointed as bifid, rounded lamella; angular lamella small, curved slightly towards the upper-palatal fold; parietal lamella not prolonged posteriorly; small rounded nodule behind the angular-parietal lamella; infraparietal lamella like a callus or a tubercle; columellar lamella semicircular, horizontal, with a wall very expanded; subcolumellar lamella like a callus or a tubercle, expanded wall; basal fold semicircular, slightly prolonged posteriorly; lower-palatal fold semicircular, prolonged in inner of aperture; interpalatal fold similar to a callus or a tubercle, closer to the upperpalatal fold; upper-palatal fold rounded, slightly expanded posteriorly. Barriers formula: [ap(nd) + ip + c + sc] l + [b + lp + irp + up] f. (Miquel & Brito, 2019).