Opisthostoma granunculum van Benthem Jutting, 1952
Distribution:
Gua Bama, Pahang, Malaysia.
Opisthostoma granunculum van Benthem Jutting, 1952
Morphology:
By van Benthem Jutting (1952)
"shell short-cylindrical, white. First whorl smooth, subsequent ones ornamented with fine white transverse ribs, closely placed in the upper whorls, but much wider apart on the last one. Not shinning and transparent. No spiral striae discernible. Whorls 4, convex. emerging.Last whorl although hiding a little under the penultimate one not quite so oblique as in O. michaelis. about midway the last whorl is constricted transversely, then widens again towards the aperture and twists obliquely upward and backward. Adnate. Umbilicus open, though not wide. Aperture round, directed obliquely up and back. Peristome continuous, circular or rounded-triangular, duplex. Reaching over halfway up the height of the penultimate whorl or almost to the suture between second and third whorls Operculum unknown."
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith