Ithycythara lanceolata (C.B. Adams, 1850) is a slender-shelled mangeliid gastropod that grows up to 12 mm. The shell sculpture consists 6–8 well-marked axial ribs. Rib may form a “peak” in the middle of each whorl, where the whorl is wider. The shell is relatively abundant off the East Coast of Florida, but is also present in the Gulf of Mexico. The shell is usually white, but may present reddish-brown hues, mostly at the anterior end. The shell in the illustration was collected in December 1997 by Herb Chapin on Sanibel Island.
