Ark (clam) Shells
The Ark clam shells are numerous and one of the most common shells on the South Florida East and West coasts. On the beach where I live it is the most common shell. The shell is thick with strong ribs and may be up to about 3" in size. Arks have a straight hinge which has numerous teeth. The common Ark shell types are the Incongruous Ark and Ponderous Ark as well as the well-known "Turkey Wing" and "Mossy Ark" types. The Turkey Wing has a brilliant striped lines and is shaped like a bird wing.
Attached to this page are various types of Ark shells I've found on S. Hutchinson Island, Florida.
Incongruous Ark
Turkey Wing (Zebra Ark)
Mossy Ark
Ponderous Ark
Transverse Ark
Red-Brown Ark
Doc Bale's Ark
Cut-ribbed Ark
Blood Ark
White-beard Ark
Cancellate Ark
Delicate Ark