{{Short description|Species of gastropod}} {{Speciesbox | image = Acmaea mitra.jpg | image_caption = A live individual of ''Acmaea mitra''. The shell is covered in encrusting red coralline algae, which is why it appears to be pink | taxon = Acmaea mitra | authority = Rathke, 1833 | synonyms = ''Scurria mitra'' <small>(Rathke, 1833)</small> superseded combination |display_parents= 3 }}
'''''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),<ref name="Nakano 2007">{{cite journal | author=Nakano, T. & T. Ozawa | title=Worldwide phylogeography of limpets of the order Patellogastropoda: molecular, morphological and palaeontological evidence | journal=Journal of Molluscan Studies | volume=73 | issue=1 | pages=79–99 | date=2007 | doi=10.1093/mollus/eym001 | doi-access=free }}</ref> 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.<ref>{{cite journal | author=Nakano, T. & T. Sasaki | title=Recent advances in molecular phylogeny, systematics and evolution of patellogastropod limpets |journal=Journal of Molluscan Studies | volume=77 | issue=3 | pages=203–217 | date=2011 | doi=10.1093/mollus/eyr016 | doi-access=free }}</ref>
''Acmaea mitra'' is the type of the genus ''Acmaea.''<ref>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</ref>
==Description== {{Expand section|date=March 2024|small=no}}
The length of the shell varies between 12 mm and 38 mm. ==Distribution== thumb|left|Distribution This species occurs in the Pacific Ocean between Alaska and Baja California, Mexico.
==References== {{Reflist}} * Rosenberg, G. 1992. Encyclopedia of Seashells. Dorset: New York. 224 pp. * Nakano T. & Ozawa T. (2007). Worldwide phylogeography of limpets of the order Patellogastropoda: molecular, morphological and paleontological evidence. Journal of Molluscan Studies 73(1): 79–99.
==External links== {{Commons category}} * [https://www.biodiversitylibrary.org/page/56520113 Rathke H. (1833). Zoologischer Atlas, enthaltend Abbildungen und Beschreibungen neuer Thierarten, während des flottcapitains v. Kotzebue zweiter reise un die welt, auf der russisch-kaiserlichen kriegsschlupp Predpriaetië in den jahren 1823-1826. Berlin: G. Reimer. Bd. 5. S. viii+1-28] * [https://www.biodiversitylibrary.org/page/8527844 Hanna, G. D. & Smith, A. G. (1931). Notes on Acmaea funiculata (Carpenter). The Nautilus. 45(1): 21-25, pl. 2]
<gallery> File:Acmaea mitra 002.jpg|apical view File:Acmaea mitra 001.jpg|basal view </gallery>
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mitra Category:Gastropods described in 1833
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