Acmaea mitra

Acmaea mitra, common name the whitecap limpet, is a species of sea snail or true limpet, a marine gastropod mollusc in the family Acmaeidae, one of the families of true limpets.

Acmaea mitra
A live individual of Acmaea mitra. The shell is covered in encrusting red coralline algae, which is why it appears to be pink
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Family:	Acmaeidae
Genus:	Acmaea
Species:	A. mitra
Binomial name
Acmaea mitra Rathke, 1833

Taxonomy

Acmaea mitra was placed in the family Acmaeidae for many years, but based on molecular phylogeny evidence by Nakano & Ozawa (2007)[1] Acmaeidae was synonymized with Lottiidae. However, this synonymy was subsequently found incorrect, having been the result of contaminated samples, and Acmaea mitra and a related species, Niveotectura pallida form a well-supported clade outside of the Lottiidae, and Acmaeidae was re-established.[2]

Acmaea mitra is the type of the genus Acmaea[3]

References

1. Nakano, T. & T. Ozawa (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. Nakano, T. & T. Sasaki (2011). "Recent advances in molecular phylogeny, systematics and evolution of patellogastropod limpets". Journal of Molluscan Studies. 77 (3): 203–217. doi:10.1093/mollus/eyr016.
3. Gofas, S. (2009). Acmaea Eschscholtz, 1833. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=137616 on 2010-03-30

• 
  apical view
• 
  basal view