The family is monospecific.
 

Shell large to very large, fusiform, heavy, operculate, with whorls bearing up to 2 varices, these being rarely connected to those of adjacent whorls; last whorl measuring circa ⅔ of total shell heigh; aperture subcircular, with a set of large teeth inside the labial margin; columellar callus provided adapically with a strong oblique fold, and randomly wrinkled elsewhere; anterior siphonal canal open, semi-tubular, marked but not long; posterior canal reduced to a kind of notch or labial undulation near the sloping columellar fold. The animal emits a powerful dye.