Tauphaedusa fusaniana, common name the Busan door snail, is a species of sinistral (left-coiling), air-breathing land snail in the family Clausiliidae.
The species comprises two recognized subspecies with distinct morphological and geographical differences. The nominate subspecies, Tauphaedusa fusaniana fusaniana, features 10 to 11 whorls and a distinct superior lamella, typically inhabiting somewhat dry shrubberies and rock piles across southern South Korea and its coastal islands. In contrast, Tauphaedusa fusaniana uturyotoensis is characterized by 10.5 whorls, a low and blunt superior lamella, and a long, distinct principal plica inside the shell. Furthermore, this subspecies is strictly endemic to Ulleungdo Island, where it resides in damp forest leaf litter and rock crevices.
Description and biology The shell reaches a length of and a diameter of , with a total of 12 whorls.
The shell is slender and pupiform (club-shaped), typically ranging from yellowish-white to yellow. The apex is spherical and unangled, leading to a spire with deep sutures. It is a hermaphroditic and ovoviviparous species, undergoing direct development without a free-living larval stage.
Original description:
Distribution This species is endemic to the Korean Peninsula.
References
External links Tauphaedusa fusaniana (Pilsbry & Y. Hirase, 1908) Tauphaedusa fusaniana uturyotoensis (Kuroda & Hukuda, 1944)