The shell is of medium size, relatively stout, with a high spire and large rounded body whorl, the anterior canal of medium length, straight except at the tip, which is recurved. The subsutural fasciole is deep and narrow, strongly sculptured with small axial riblets crossed by three spiral threads (strongest in their intervals) and which cover the entire space. The sculpture is fusoid, formed by strong, rounded axial riblets (11 on the body whorl) overridden by regular primary spiral cords of which there are about 16 on the body from the edge of the subsutural fasciole to the middle of the base, with smaller and more crowded spirals along the back of the anterior canal; about five spiral cords cross the axials on the penultimate whorl between the fasciole and lower suture. The outer lip is expanded, stromboid, edged by a large varical rib, flattened in front and bordered behind by a deeply impressed groove, the anal sinus wide and deep. The apertural denticles in the type are weak and lie only in the middle on the outer lip and on the columella on the inner. Color of fresh specimens is brown with a white band in the middle. Length 25.7 mm, diameter 10.7 mm, holotype.

The holotype is a dead shell, fresh, white with a trace of color. The species resembles G. dentiferum Gabb of the Miocene of Santo Domingo, and also G. gabbi Dall of the Caribbean, the most obvious differences from those species being its wider body whorl, weaker lip denticles, and coloration.

Pacific Panama.