Shell moderately large, 40-50 mm., or more, biconic-fusiform, with a capacious body-whorl, gradually contracted to a very short, widely open but very shallowly notched anterior canal. Protoconch of 4 - 4 1/2 whorls, erect, dome-shaped, the tip flattened and planorbid, smooth except for the last whorl, which is strongly spirally ridged, but without axials. Sinus broad and shallow, occupying most of the shoulder slope. Suture not margined. Adult sculpture of spiral cords or threads and oblique nodes on a medially placed peripheral angle. The genus has possible relationship with the Austro-Neozelanic Belophos-Austrotoma group of genera and the North Pacific Recent and Tertiary Megasurcula. Range — Eocene to Pliocene of Europe, Eocene of the southeastern United States and Oligocene of northwestern America.