Ko te peristome flattened taea e ki te 8 mm whanui, me te he lined ki te raupapa o niho (≤0.5 mm roa) i runga i tona rohe o roto. Ko te taupoki operculum he narrowly obovate, me te ki te 3.8 cm roa, me te 1.3 cm whanui. Ko te mata o raro o te taupoki e titaritari mirumiru mirumiru iti e te i te huri noa i te whitiki. A tawhio noa 20 ki te 30 crater-whānui nui-rite mirumiru (≤0.5 mm) kei roto i te apical mirumiru. Ko enei mirumiru e te nuinga o te wā e kitea i runga i te āhua o te mirumiru, engari he nui kia rite ki te mea e kitea i runga i te tuawha o te taupoki o te taupoki. (He aha te mea nui mō te taupoki o te taupoki?)
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