Transennella stimpsoni Dall, 1902 reaches 14 mm in length. The rounded-trigonal shell is smooth except for very low commarginal (“concentric”) ridges. The shell color is usually white, often with brown or violet chevron-like markings, internally infused with purple. The outer shell layer, or periostracum, is varnish-like, yellowish. Compare with the locally occurring Transennella conradina, which is more pointed posteriorly and lacks the purple color. Also known as Stimpson's Transennella. This unusually dark shell was collected by Ken Piech on August 1, 2021, on Bunche Beach, Fort Myers, Florida. It is a new record of the species for our general area.
