Eoacmaea

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

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

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]

• Eoacmaea albonotata (Smith, 1901)
• Eoacmaea calamus (Crosse & Fischer, 1864)
• Eoacmaea ceylanica (E.A. Smith, 1911)
• Eoacmaea chamorrorum (Lindberg & Vermeij, 1985)
• Eoacmaea conoidalis (Pease, 1868)
• Eoacmaea ivani (Christiaens, 1975)
• Eoacmaea javanica (Nakano, Aswan & Ozawa, 2005)
• Eoacmaea mauritiana (Pilsbry, 1891)
• Eoacmaea omanensis (Christiaens, 1975)
• Eoacmaea perfestiva (Faber, 2004)
• Eoacmaea profunda (Deshayes, 1863) - type species
• Eoacmaea pustulata (Helbling, 1779)
• Eoacmaea semirubida (Dall, 1914)

References

1. Nakano T. & Ozawa T. (2007). "Worldwide phylogeography of limpets of the order Patellogastropoda: Molecular, morphological and palaeontological evidence". Journal of Molluscan Studies73(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