Vermeulen (1991) original descriptions on Opisthostoma telestoma – “Shell white, approximately opaque. Whorls 3-3¾ (tuba not included); top whorls moderately oblique, somewhat elevated; body whorls forming a somewhat obliquely cylindrical body convex, well rounded with the suture well impressed. Constriction rather distinct, gradual. Tuba consisting of approximately ½ whorl, free, approximately circular in section. Shell with thin radial ribs, which are widely spaced near the top, moderately spaced and low on the upper body whorl (13-21 ribs present on this whorl), slightly more prominent and wider spaced on the lower body whorl, widely spaced, inconspicuous and low over the area of the constriction, and widely spaced, distinct and very high on the tuba. Ribs crossed by fine spiral striation. Umbilicus usually open, deep, narrow. Aperture with the imaginary plane through the inner peristome tilted up to 30 degrees with regard to the coiling axis of the body whorls; with the upper margin at most touching the plane perpendicular to the coiling axis of the body whorls as well as through the apex; widely ovate; apertural teeth absent; inner peristome thickened, moderately reflected; outer peristome distinctly flaring on the palatal side. Constriction inside with two teeth; one distinct, oblique, short, rather high infracolumellaris, one rather inconspicuous, transverse, long, low palatalis.”
Opisthostoma telestoma – “Measurements. - Height of body whorls 0.9-1.2 mm; width including tuba 1.4-1.9 mm, without tuba 0.8-1.0 mm; height or aperture 0.5 mm: width of aperture 0.5·0.6 mm.” (Vermeulen, 1991)
Type locality – “Sabah; interior Zone; Pun Batu approximately 30 km W. of Sepulot” (Vermeulen, 1991)
Other localities – “Kudat Zone; Pulau Banggi, southernmost point” (Vermeulen, 1991)