Emarginulinae

Emarginulinae
	A shell of Emarginula striatula
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Vetigastropoda
Superfamily:	Fissurelloidea
Family:	Fissurellidae
Subfamily:	Emarginulinae; Children, 1834
Tribes
	See text
Synonyms[1]
	Fissurellideinae; Zeidoridae;

The subfamily Emarginulinae, common name keyhole limpets and slit limpets, is a taxonomic subfamily of limpet-like sea snails, marine gastropod molluscs in the family Fissurellidae, the keyhole limpets and slit limpets.[1]

The subfamily consists of the following tribes:[2]

Tribe Emarginulini Children, 1834 - synonyms: Rimulidae, Anton, 1838; Zeidoridae Naef, 1913; Hemitominae Kuroda, Habe & Oyama, 1971; Clypidinidae Golikov & Starobogatov, 1989
Tribe Diodorini Odhner, 1932: this tribe has been raised to the rank of subfamily Diodorinae Odhner, 1932 [3]
Tribe Fissurellideini Pilsbry, 1890
Tribe Scutini Christiaens, 1973

Of the three subfamilies in Fissurellidae, the subfamily Emarginulinae is the oldest: its earliest known species date back to the Mesozoic.[4]

The various tribes belong to this subfamily because of the unifying features in their radula. Several tribes were formerly accepted as subfamilies, because of the differences in their shell. The Emargulini have a caplike shell with a slit in the margin but without an apical opening (foramen). The Scutini have a flat shield-shaped shell with a vague indentation at the back. The other tribes have a caplike shell with a round, oval or triangular apical opening.

The species of this subfamily can be found attached to rocks or coral. They are Herbivores.

References

Bouchet, P.; Gofas, S. (2012). Emarginulinae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224510 on 2013-01-01
Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)
Aktipis S.W., Boehm E. & Giribet G. (2011) Another step towards understanding the slit-limpets (Fissurellidae, Fissurelloidea, Vetigastropoda, Gastropoda): a combined five-gene molecular phylogeny. Zoologica Scripta 40: 238-259
McLean, James H.; R.N. Kilburn (September 1986). "Propodial elaboration in Southern African and Indian Ocean Fissurellidae (Mollusca, Prosobranchia) with description of two new genera and one new species" (PDF). Contributions in Science. 379. Retrieved 2010-07-19.

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[WoRMS-1] Bouchet, P.; Gofas, S. (2012). Emarginulinae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224510 on 2013-01-01

[2] Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)

[3] Aktipis S.W., Boehm E. & Giribet G. (2011) Another step towards understanding the slit-limpets (Fissurellidae, Fissurelloidea, Vetigastropoda, Gastropoda): a combined five-gene molecular phylogeny. Zoologica Scripta 40: 238-259

[4] McLean, James H.; R.N. Kilburn (September 1986). "Propodial elaboration in Southern African and Indian Ocean Fissurellidae (Mollusca, Prosobranchia) with description of two new genera and one new species" (PDF). Contributions in Science. 379. Retrieved 2010-07-19.