Patellogastropoda
| True limpets Temporal range: Middle Ordovician–Recent |
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| Images of true limpets, shell and live individuals of three species | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Clade: |
Patellogastropoda Lindberg, 1986 |
| Superfamilies and families | |
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See text |
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See text
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.
The clade Patellogastropoda is deemed monophyletic based on optimal phylogenetic analysis.
Patellogastropoda was proposed by David R. Lindberg, 1986, as an order, and was later included in the subclass Eogastropoda Ponder & Lindberg, 1996.
Bouchet & Rocroi, 2005 designated Patellogastropoda, true limpets, as a clade, rather than as a taxon, but within included superfamilies and families as listed below. Families that are exclusively fossil are indicated with a dagger †:
With the exception of calling Patellogastropoda a clade rather than an order, as was previously the case in Ponder and Lindberg, 1997 the taxa has not changed much, differing more in the arrangement of its content rather than in the overall composition. Bouchet and Rocroi omitted Ponder and Lindberg's suborders, and added in the superfamily Neolepetopsoidea.
Nakano & Ozawa (2007) made many changes in the taxonomy of the Patellogastropoda, based on molecular phylogeny research: Acmaeidae is a synonym of Lottiidae; Pectinodontinae is elevated to Pectinodontidae; new family Eoacmaeidae with the new type genus Eoacmaea is established.
A cladogram based on sequences of mitochondrial 12S ribosomal RNA, 16S ribosomal RNA and (COI) genes showing phylogenic relations of Patellogastropoda by Nakano & Ozawa (2007) and superfamilies based on World Register of Marine Species:
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