Siphonariidae

Siphonariidae, also known as false limpets, are a taxonomic family of small to medium-sized air-breathing sea snails, marine and brackish water pulmonate gastropod molluscs.

Empty siphonariid limpet shells can be distinguished from true limpet shells by examining the interior.

In the siphonariids there is a well-marked lateral groove on the right side of the shell, and a corresponding interruption of the ring of muscle attachment scars.

These markers show the positioning of the pneumostome or pulmonary orifice.

Genera in the family Siphonariidae include:

Ventral view of a shell of Siphonaria zelandica showing the siphonal groove on the right