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Patelloida profunda 002.jpg
Eoacmaea profunda shell
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Patellogastropoda
Superfamily: Eoacmaeoidea
Nakano & Ozawa, 2007[1]
Family: Eoacmaeidae
Nakano & Ozawa, 2007[1]
Genus: Eoacmaea
Nakano & Ozawa, 2007[1]
13 species

Eoacmaea is a genus of sea snails or true limpets, marine gastropod mollusks in the clade Patellogastropoda, the true limpets.

Eoacmaea is the only genus in the family Eoacmaeidae, that is the only family in the superfamily Eoacmaeoidea.


The generic name Eoacmaea is composed from the Eo that mean "early"[1] in Greek and Acmaea,[1] that is the genus of gastropod in family Lottiidae.


The family Eoacmaeidae was established by Nakano & Ozawa (2007)[1] for the genus Eoacmaea.

A cladogram based on sequences of mitochondrial 12S ribosomal RNA, 16S ribosomal RNA and cytochrome-c oxidase I (COI) genes showing phylogenic relations of Patellogastropoda by Nakano & Ozawa (2007)[1] and superfamilies based on World Register of Marine Species:[2]



Lottiidae (including Acmaea and Niveotectura)







Eoacmaeidae - only one genus Eoacmaea

Eoacmaea is the most basal group within Patellogastropoda[1] and Eoacmaea have diversified from other Patellogastropoda in Tethys Ocean in Triassic or Jurassic about 203 million years ago (limits are from 143 to 279 million years ago).[1]


Species within the genus Eoacmaea include:[1]


  1. ^ a b c d e f g h i j k Nakano T. & Ozawa T. (2007). "Worldwide phylogeography of limpets of the order Patellogastropoda: Molecular, morphological and palaeontological evidence". Journal of Molluscan Studies 73(1) 79-99. doi:10.1093/mollus/eym001.
  2. ^ Gofas, S. (2010). Patellogastropoda. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=382158 on 2010-04-01