Protoconch: smooth, globular, strongly hyperstrophic (approximately 135° to teleoconch axis), embryonic whorl not exposed; multispiral, number of whorls not ascertained; 420-500 µm in maximum diameter; with weak, hardly elevated peritreme. Curved anal keel bordering deep umbilicus, the latter (in well-preserved specimens) completely covered by thin, reddish-brown lamella extending between first teleoconch whorl and anal keel. Glassy white, suture and outer lip lined with brown.
Teleoconch: slender pagoda-shaped, base acutely angled; 3.1 to 6.2 at 4 1/3 to 6 1/2 whorls. Spire angle 29-30°. Pattern of relatively coarse spiral ribs and axial bulges, intersecting at approximately right angles to form coarse nodules, especially on keel-forming third primary spiral rib; with 12-16 axials on fourth whorl. 16 on body whorl of largest specimen examined. Fine underlying sculpture of axial riblets. Exposed upper part of first whorl with 5 spiral ribs, with the keel-forming middle one strongest. Upper point of whorl attachment initially below the fifth spiral rib. resulting in rectangular appearance of first whorl. Beginning with second whorl, point of whorl attachment on fifth rib. partly or wholly covering it. Later whorls with additional spiral threads. On body whorl, fifth primary rib and one of almost equal strength below it. forming double keel at outer base. Straight, somewhat recessed basal area with 1-4 spiral threads and distinct axial threads, especially in the outer area. Umbilicus open in smaller specimens, partly covered by columellar lip; closed in largest specimen examined. Coloration: off-white to yellowish tan. with nodes on all ribs conspicuously white. Animal: unknown.