Spire conical with flat sides. Apex slightly oblique or not. Tuba abruptly narrowed towards the constriction, angular below. Radial ribs on the spire rather closely placed. Aperture tilted 40-50 degrees with regard to the coiling axis, its upper margin widely above the level of the apex, circular to elliptic. Peristome touching the spire, double; outer peristome widely spreading beyond the inner but on the side which touches the spire with a deep sinus flanked at both sides by a distinct, widely rounded wing; inner peristome not or hardly protruding from the outer, spreading.