Semicassis labiata

Semicassis labiata
	Semicassis labiata (Lamarck, 1822)
	underside of living specimen
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda; clade Hypsogastropoda; clade Littorinimorpha
Superfamily:	Tonnoidea
Family:	Cassidae
Subfamily:	Cassinae
Genus:	Semicassis
Species:	S. labiata
Binomial name
	Semicassis labiata; (Perry, 1811)
Synonyms
	Cassidea labiata Perry, 1811; Cassis achatina Lamarck, 1816; Phalium (Xenogalea) labiatum (Perry, 1811); Phalium labiatum (Perry, 1811); Semicassis (Semicassis) labiata (Perry, 1811)· accepted, alternate representation; Semicassis labiata iheringi (Carcelles, 1953); Semicassis labiata labiata (G. Perry, 1811)· accepted, alternate representation; Xenogalea collactea Finlay, 1928; Xenogalea insperata Iredale, 1927;

Semicassis labiata (formerly also known as Phalium labiatum) is a species of large predatory sea snail, a marine gastropod mollusc. This species is in the subfamily Cassinae, the "helmet shells" and "bonnet shells", which feed on sea urchins.^[2]

Subspecies

This species occurs in New Zealand^[3]

The maximum recorded shell length of Semicassis labiata iheringi is 76 mm.^[4]

The minimum recorded depth of Semicassis labiata iheringi is 25 m, and the maximum recorded depth is 84 m.^[4]

^ ^a ^b ^c WoRMS (2010). Semicassis labiata. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=533621 on 2011-02-17
^ Gofas, S. (2012). Semicassis labiata (Perry, 1811). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=533621 on 2012-07-15
^ Powell A. W. B. (1979). William Collins Publishers Ltd, Auckland ISBN 0-00-216906-1.
^ ^a ^b Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. doi:10.1371/journal.pone.0008776.

Finlay, H. J. (1928). The Recent Mollusca of the Chatham Islands. Transactions of the New Zealand Institute. 59: 232-286.
Dautzenberg, Ph. (1929). Mollusques testacés marins de Madagascar. Faune des Colonies Francaises, Tome III
MacDonald & Co (1979). The MacDonald Encyclopedia of Shells. MacDonald & Co. London & Sydney.
Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch

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