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Limpets are a group of aquatic snails that exhibit a conical shell shape (patelliform) and a strong, muscular foot. Although all limpets are members of the class Gastropoda, limpets are polyphyletic, meaning the various groups which are referred to as "limpets" have descended independently from different ancestral gastropods. This general category of conical shell is known as "patelliform" (dish-shaped). All members of the large and ancient marine clade Patellogastropoda are limpets. Within that clade, the members of the Patellidae family in particular are often referred to as "true limpets".
The Patellogastropoda, common name true limpets and historically called the Docoglossa, are members of a major phylogenetic group of marine gastropods, treated by experts either as a clade or as a taxonomic order.
Fissurellidae, common name the keyhole limpets and slit limpets, is a taxonomic family of limpet-like sea snails, marine gastropod molluscs in the clade Vetigastropoda. Their common name derives from the small hole in the apex of their cone-like shells. Although superficially resembling "true" limpets, they are in fact not closely related to them.
Patellidae is a taxonomic family of sea snails or true limpets, marine gastropod molluscs in the clade Patellogastropoda.
The Calyptraeidae are a family of small to medium-sized marine prosobranch gastropods.
Nacella is a southern, cold-water genus of true limpets, marine gastropod molluscs in the family Nacellidae, the true limpets.
Radiacmea inconspicua is a species of small sea snail or true limpet, a marine gastropod mollusc in the family Lottiidae, one of the true limpet families.
Notoacmea is a southern genus of true limpets, marine gastropod molluscs in the family Lottiidae, the true limpets.
Patelloida is a genus of sea snails or true limpets, marine gastropod molluscs in the family Lottiidae, one of the families of true limpets.
Atalacmea is a genus of sea snails or true limpets, marine gastropod molluscs in the family Lottiidae, one of the families of true limpets.
Notoacmea subtilis is a minute species of sea snail or true limpet, a marine gastropod mollusc in the family Lottiidae, one of the families of true limpets.
Notoacmea badia is a species of sea snail or true limpet, a marine gastropod mollusc in the family Lottiidae, one of the families of true limpets.
Notoacmea scopulina is a species of sea snail or true limpet, a marine gastropod mollusc in the family Lottiidae, one of the families of true limpets.
Notocrater is a genus of deep-water true limpets, marine gastropod molluscs in the family Pseudococculinidae, one of the families of true limpets.
Cellana denticulata, or the denticulate limpet, is a species of true limpet, a marine gastropod mollusc in the family Nacellidae, one of the families of true limpets. It is endemic to New Zealand.
Cellana radians, common name the radiate limpet, is a species of true limpet, a marine gastropod mollusc in the family Nacellidae, which is one of the true limpet families.
Cellana strigilis is a species of large limpet, a marine gastropod mollusc in the family Nacellidae, one of the families of true limpets.
Maoricrater is a genus of true limpets, marine gastropod molluscs in the family Lepetidae, the true limpets. This genus is endemic to New Zealand. It can grow up to 4 mm in length.
Maoricrater explorata is a southern, cold-water species of limpet, a marine gastropod mollusc in the family Lepetidae, the true limpets. It is found in New Zealand.
Notoacmea elongata is a species of sea snail, a true limpet, a marine gastropod mollusk in the family Lottiidae, one of the families of true limpets.
References
- Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
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