Keystone snails: the biology, behaviour, ecology and conservation of patellid limpets

A familiar sight on rocky shores, the patellid limpets of the genus Patella include just three species in Britain and Ireland: the Common Limpet, China Limpet and Black-footed Limpet. Here Stephen Hawkins, Alan Hodgson and Louise Firth describe the evolutionary and natural history of these species, the threats they face and the need for their conservation.