Diplommatina evexa Vermeulen, 1993  

Vermeulen (1993) original descriptions on Diplommatina evexa – “Shell dextral, more or less cylindrical, last two whorls widest. Whorls 5-5 5/8, convex. Suture impressed. Constriction level with the parietal side of the peristome, with 1 parietalis, 1 transversal palatalis, 1 columellaris. Tuba 7/8 whorl. Radial ribs straight. Rather distinct, rather low, rather thin, densely placed, somewhat wider spaced on the last 1½ whorl (11-13 ribs/0.5 mm on the penultimate whorl). Spiral striation inconspicuous. Umbilicus closed. Aperture hardly tilted with regard to the coiling axis; columellaris rather inconspicuous, directed downwards. Peristome double, expanding; palatal side not sinuous, without edge, basal side without edge; basal edge not sinuous, rounded, outer peristome somewhat expanding beyond the inner; inner peristome with a palatal lip, free and slightly erect on the columellar side, somewhat expanding on the parietal side.”