# Eoacmaea

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Genus of gastropods

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

***Eoacmaea*** is a genus of [sea snails](/source/Sea_snail) or true [limpets](/source/Limpet), [marine](/source/Marine_(ocean)) [gastropod](/source/Gastropod) [mollusks](/source/Mollusk) in the subclass [Patellogastropoda](/source/Patellogastropoda), the true limpets.[2]

*Eoacmaea* is the only genus in the family **Eoacmaeidae**, belonging to the superfamily [Lottioidea](/source/Lottioidea).

## Etymology

The [generic name](/source/Name_of_a_biological_genus#Generic_name) *Eoacmaea* is composed from the *Eo* that mean "early"[1] in Greek and *[Acmaea](/source/Acmaea)*,[1] that is the genus of gastropod in family [Lottiidae](/source/Lottiidae).

## Taxonomy

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

A [cladogram](/source/Cladogram) based on sequences of mitochondrial [12S ribosomal RNA](/source/12S_ribosomal_RNA), [16S ribosomal RNA](/source/16S_ribosomal_RNA) and [cytochrome-c oxidase I](/source/Main_subunit_of_cytochrome_c_oxidase) (COI) genes showing phylogenic relations of Patellogastropoda by Nakano & Ozawa (2007)[1] and superfamilies based on [World Register of Marine Species](/source/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](/source/Basal_(phylogenetics)) within Patellogastropoda[1] and *Eoacmaea* [have diversified](/source/Bayesian_inference_in_phylogeny) from other Patellogastropoda in [Tethys Ocean](/source/Tethys_Ocean) in [Triassic](/source/Triassic) or [Jurassic](/source/Jurassic) about 203 million years ago (limits are from 143 to 279 million years ago).[1]

## Species

Species within the genus *Eoacmaea* include:[1]

- *[Eoacmaea albonotata](/source/Eoacmaea_albonotata)* (Smith, 1901)

- *[Eoacmaea calamus](/source/Eoacmaea_calamus)* (Crosse & Fischer, 1864)

- *[Eoacmaea ceylanica](/source/Eoacmaea_ceylanica)* (E.A. Smith, 1911)

- *[Eoacmaea chamorrorum](/source/Eoacmaea_chamorrorum)* (Lindberg & Vermeij, 1985)

- *[Eoacmaea conoidalis](/source/Eoacmaea_conoidalis)* (Pease, 1868)

- *[Eoacmaea ivani](/source/Eoacmaea_ivani)* (Christiaens, 1975)

- *[Eoacmaea javanica](/source/Eoacmaea_javanica)* (Nakano, Aswan & Ozawa, 2005)

- *[Eoacmaea mauritiana](/source/Eoacmaea_mauritiana)* (Pilsbry, 1891)

- *[Eoacmaea omanensis](/source/Eoacmaea_omanensis)* (Christiaens, 1975)

- *[Eoacmaea perfestiva](/source/Eoacmaea_perfestiva)* (Faber, 2004)

- *[Eoacmaea profunda](/source/Eoacmaea_profunda)* (Deshayes, 1863) - type species

- *[Eoacmaea pustulata](/source/Eoacmaea_pustulata)* (Helbling, 1779)

- *[Eoacmaea semirubida](/source/Eoacmaea_semirubida)* (Dall, 1914)

## References

1. ^ [***a***](#cite_ref-Nakano_2007_1-0) [***b***](#cite_ref-Nakano_2007_1-1) [***c***](#cite_ref-Nakano_2007_1-2) [***d***](#cite_ref-Nakano_2007_1-3) [***e***](#cite_ref-Nakano_2007_1-4) [***f***](#cite_ref-Nakano_2007_1-5) [***g***](#cite_ref-Nakano_2007_1-6) [***h***](#cite_ref-Nakano_2007_1-7) 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](/source/Doi_(identifier)):[10.1093/mollus/eym001](https://doi.org/10.1093%2Fmollus%2Feym001).

1. ^ [***a***](#cite_ref-WoRMS_2-0) [***b***](#cite_ref-WoRMS_2-1) 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](http://www.marinespecies.org/aphia.php?p=taxdetails&id=456551) on 2020-11-03

Taxon identifiers Eoacmaea Wikidata: Q5381563 Wikispecies: Eoacmaea AFD: Eoacmaea BOLD: 772758 CoL: 7P3GG GBIF: 6521375 iNaturalist: 541666 IRMNG: 1467785 NCBI: 2494649 Open Tree of Life: 5681149 WoRMS: 456551

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Adapted from the Wikipedia article [Eoacmaea](https://en.wikipedia.org/wiki/Eoacmaea) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Eoacmaea?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.