Look alikes:
This species has a aperture directed upward where the complete aperture can be seen from the top. Another 13 species from Peninsular Peninsular and 2 species from Borneo share the same character. However, they are rather different from other aspect of shell characters in the terms of tilting of coiling axis and shell surface ribs density.
Distribution:
Ulu Tembeling, Gua Che Yatim, Pahang, Malaysia.
Taxonomic name: