Acmaea mitra
Introduction '''''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.
Taxonomy ''Acmaea mitra'' was placed in the family Acmaeidae for many years, but based on molecular phylogeny evidence by Nakano & Ozawa (2007) 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. ''Acmaea mitra'' is the type of the genus ''Acmaea''
References File:Acmaea mitra 002.jpg|apical viewFile:Acmaea mitra 001.jpg|basal view