Type material: Holotype (22 mm wide x 10mm high) deposited at Paris National Museum of Natural History, France with Registration No MNHN-IM-2000-38149. Other material: Paratype 1 (23.5mm) and Paratype 2 (20.8mm) in Dr Thach collection. All types from type locality.
Type locality: North Boreno Island, Kalimantan, Indonesia
Habitat: among leaf litter
Diagnosis: The new species is characterized by very low and nearly flat of spire, double outer lip, channeled sutures and broad air tube covering upper margin of aperture.
Description: Shell medium-sized for the genus (with width range (20.8-22.0mm), discoid and moderately thick. Spire very low and nearly flat, sutures channeled.
Shell height 42% of width. Body whorl inflated with rounded periphery, not detached from the remaining shell and ornamented with zigzag stripes. Sculpture consists mainly of many closely-spaced axial ribets. Air tube flat, triangular, broad, slightly descending and covering upper margin of aperture. Ventral side strongly convex. Aperture rounded, strongly oblique and occupying 79.7% of shell height, 40.3% of shell width, outer lip double, moderately thick and reflected. Columella regularly curved, umbilicus widely open and deep. Operculum yellow-brown with many layers and central nucleus. Color red-brown with white transverse stripes, outer lip and columella.

The new species differs mainly from Pterocyclus comatus Beddome, 1881 but differs mainly in (1) flatter spire, (2) apex lower, not visible at frontal side, (3) aperture less visible at frontal view, much covered by the terminal part of body whorl, (4) air tube not strongly concave at frontal view and having different color, (5) axial stripes not continuous, well visible at lateral side, (6) sutures wider and more concave, (7) axial and radial ribs shorter and much weaker, (8) different localities, Kalimantan, Indonesia versus Anaimalai, Western Ghats, India. Etymology: The new species is named in honor of Steven Lie from Indonesia for providing the type material.