{{Short description|Genus of gastropods}} {{Automatic taxobox |image = Eoacmaea profunda (MNHN-IM-2000-4977).jpeg |image_caption = Shell of ''Eoacmaea profunda'' (syntype at MNHN, Paris) |taxon = Eoacmaea |authority = Nakano & Ozawa, 2007<ref name="Nakano 2007">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}}.</ref> |type_species= ''Patella profunda'' <small>Deshayes, 1863</small> |synonyms= |display_parents= 3 }}
'''''Eoacmaea''''' is a genus of [[sea snail]]s or true [[limpet]]s, [[marine (ocean)|marine]] [[gastropod]] [[mollusk]]s in the subclass [[Patellogastropoda]], the true limpets.<ref name="WoRMS">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</ref>
''Eoacmaea'' is the only genus in the family '''Eoacmaeidae''', belonging to the superfamily [[Lottioidea]].
== Etymology == The [[Name of a biological genus#Generic name|generic name]] ''Eoacmaea'' is composed from the ''Eo'' that mean "early"<ref name="Nakano 2007"/> in Greek and ''[[Acmaea]]'',<ref name="Nakano 2007"/> that is the genus of gastropod in family [[Lottiidae]].
== Taxonomy == The family Eoacmaeidae was established by Nakano & Ozawa (2007)<ref name="Nakano 2007"/> for the genus ''Eoacmaea''.
A [[cladogram]] based on sequences of mitochondrial [[12S ribosomal RNA]], [[16S ribosomal RNA]] and [[Main subunit of cytochrome c oxidase|cytochrome-c oxidase I]] (COI) genes showing phylogenic relations of Patellogastropoda by Nakano & Ozawa (2007)<ref name="Nakano 2007"/> and superfamilies based on [[World Register of Marine Species]]:<ref name="WoRMS" />
{{clade |label1=[[Patellogastropoda]] |1={{clade |1={{clade |label1=[[Lottioidea]] |1={{clade |1=[[Lottiidae]] (including ''[[Acmaea]]'' and ''[[Niveotectura]]'') |2={{clade |1={{clade |1=[[Pectinodontidae]] |2=[[Lepetidae]] }} |2=[[Nacellidae]] }} }} |label2=[[Patelloidea]] |2=[[Patellidae]] }} |label2='''Eoacmaeoidea''' |2='''Eoacmaeidae''' - only one genus '''''Eoacmaea''''' }} }}
''Eoacmaea'' is the most [[Basal (phylogenetics)|basal group]] within Patellogastropoda<ref name="Nakano 2007"/> and ''Eoacmaea'' [[Bayesian inference in phylogeny|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).<ref name="Nakano 2007"/>
== Species == Species within the genus ''Eoacmaea'' include:<ref name="Nakano 2007"/> * ''[[Eoacmaea albonotata]]'' <small>(Smith, 1901)</small> * ''[[Eoacmaea calamus]]'' <small>(Crosse & Fischer, 1864)</small> * ''[[Eoacmaea ceylanica]]'' <small>(E.A. Smith, 1911)</small> * ''[[Eoacmaea chamorrorum]]'' <small>(Lindberg & Vermeij, 1985)</small> * ''[[Eoacmaea conoidalis]]'' <small>(Pease, 1868)</small> * ''[[Eoacmaea ivani]]'' <small>(Christiaens, 1975)</small> * ''[[Eoacmaea javanica]]'' <small>(Nakano, Aswan & Ozawa, 2005)</small> * ''[[Eoacmaea mauritiana]]'' <small>(Pilsbry, 1891)</small> * ''[[Eoacmaea omanensis]]'' <small>(Christiaens, 1975)</small> * ''[[Eoacmaea perfestiva]]'' <small>(Faber, 2004)</small> * ''[[Eoacmaea profunda]]'' <small>(Deshayes, 1863)</small> - type species * ''[[Eoacmaea pustulata]]'' <small>(Helbling, 1779)</small> * ''[[Eoacmaea semirubida]]'' <small>(Dall, 1914)</small>
==References== {{Reflist}}
{{Taxonbar|from=Q5381563}}
[[Category:Eoacmaea| ]] [[Category:Gastropod genera]] [[Category:Lottioidea]]