Siphonariidae - False limpets

Siphonariidae, the false limpets, have ovate, conic, open shells. The organism lives underneath the shell and uses its muscular foot to attach to hard substrates. False limpets, although resembling true limpets, are air breathers and do not possess true gills. They live in semi-aquatic environments, such as the intertidal zone along jetties. The empty shell can be distinguished from true limpets by having a groove on the right side of the underside which transects the ring of muscle attachment scars. Their primary prey is microscopic plant life. There are 2 species found in Texas.