Distribution: Florida to Texas.
Size: Diameter 2.6 mm (Vs in); altitude 1.7 mm
Description: Color whitish in fresh material; shape trochoid, wider than high, dome shaped; sculpture of spiral zigzag lines; keel found at periphery; base flat with spiral threads and thickened radial waves; spire abrupt with protoconch of 1 Vi whorls and teleoconch of 2,5 whorls; umbilicus is usually subcircular and typically bound by a thick ridge and a heavy callus that originates from the columella, the callus sometimes reduces the umbilicus to a slitlike structure; aperture oblique; outer lip thickened.
Habitat: Shallow- to deep-water species living on sand or muddy bottoms. Depth range 0 to 152 m (500 ft).
Remarks: Variation in size and extent of the umbilical callus. See Moore (1964). Synonym: Teinostoma pilsbryi McGinty, 1945.