Publication in “The Festivus” August 2019. The new subspecies is close to Amphidromus berschaueri Thach, 2018 but differs mainly in locality (Ayu Topas versus Sei, Kolbano), slenderer shape, narrower aperture, longer and more tapering spire, presence of purple-red subsutural bands, widely-spaced (not coalescent) axial stripes at last whorl and columella is angulate (elevated at anterior part).

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