Eoacmaea

Eoacmaea is a genus of sea snails or true limpets, marine gastropod mollusks in the subclass Patellogastropoda, the true limpets. [2]

Eoacmaea
Shell of Eoacmaea profunda (syntype at MNHN, Paris)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Patellogastropoda
Superfamily: Lottioidea
Genus: Eoacmaea
Nakano & Ozawa, 2007[1]
Type species
Patella profunda Deshayes, 1863

Eoacmaea is the only genus in the family Eoacmaeidae, belonging to the superfamily Lottioidea.

Etymology

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.

Taxonomy

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]

Patellogastropoda
 
 Lottioidea 
 

Lottiidae (including Acmaea and Niveotectura)

 
 
 
 

Pectinodontidae

 
 

Lepetidae

 
 
 

Nacellidae

 
 
 
 Patelloidea 

Patellidae

 
 
 Eoacmaeoidea 

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

Species within the genus Eoacmaea include:[1]

References
  1. 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. MolluscaBase eds. (2020). MolluscaBase. Eoacmaea T. Nakano & Ozawa, 2007. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=456551 on 2020-11-03
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