Microcystina consobrina Van Benthem Jutting, 1959  

Benthem-Jutting (1959) original descriptions on Microcystina consobrina – “Shell small, low-conical, yellowish-brown, shining and transparent, finely striated according to the growth lines. There is till a more delicate spiral striation, but this is so faint that it is only discernable on the base of the whorls where the radial striae are weaker. The spiral striae are continuous lines, not series of little pits as in the next species. Whorls 4 ¼, regularly increasing in diameter. Top whorls projecting, a little mamillar. All whorls convex, with well impressed suture. This is falsely marginate on account of the previous whorls shining through. It is mostly lined by a narrow red thread. Top elevated, but not sharp. Umbilicus narrow. Aperture oblique, broad sickle-shaped, a little drawn out at the point where upper and basal margins meet. Peristome sharp, not continuous, the two ends connected by a thin membrane against the previous whorl. Columellar side a little reflected, with a minute tongue-shaped protuberance in the umbilical region, partly hiding the umbilical opening.”