Sinoennea dactylus van Benthem Jutting, 1961  

Benthem-Jutting (1961) original descriptions on Sinoennea dactylus – “Shell minute, cylindrical, glassy transparent, shining. Two top whorls smooth, following ones with regular vertical ribs. On the 3rd to 6th whorls the ribs are standing rather close, but on the last whorl more widely apart. There are 20-22 ribs on the last whorl. No spiral striation. Whorls about 6, the nos. 3-6 forming a regular cylinder. Profile of each whorl slightly convex, suture distinct but not deep. Top blunt, base rounded, umbilicus narrow, partly obstructed by a swelling of the last whorl just before the aperture. Aperture almost vertical, obliquely quadrangular with rounded angles. Peristome adnate, continuous. In the parieto-angular corner a strong lamella, on the palatal side two side teeth implanted on a common base. Of these the stronger, upper tooth almost at the margin of the peristome, the weaker, lower one somewhat deeper in the interior. The distance between the parieto-angular lamella and the upper palatal tooth is very narrow. At the columellar side there is a deeply seated tooth or plate, corresponding with a groove at the exterior side of the last part of the whorl in the umbilical region. Between this groove and the peristome the distal part of the last whorl is somewhat swollen.”