Turritella shippi

The apical angle is 8.5, the sutural angle 10.  The shell is small, elongated, and the sides of the whorls are straight.  The whorls are five or more in number, the suture is well impressed at the bottom of a well defined channel.  The ornamentation of the the shell consists of a stereotypical arrangement of six ribs, and lines of growth cover the whorls.  This specimen was found in the Buda limestone, Shoal Creek, Austin, Texas.