Littorina

Not to be confused with the Italian city of Latina (originally Littoria). For the Italian MU trains named "Littorina", see Multiple unit or Railcar.
Littorina
Two shells of the Common periwinkle, Littorina littorea
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda
clade Hypsogastropoda
clade Littorinimorpha
Superfamily: Littorinoidea
Family: Littorinidae
Subfamily: Littorininae
Genus: Littorina
Férussac, 1822[1]
Type species
Turbo littoreus Linnaeus, 1758
Species

See text.

Synonyms[2]
  • Algaroda Dall, 1918
  • Bacalia H. Adams & A. Adams, 1854
  • Brevilittorina Golikov, Dolgolenko, Maximovich & Scarlato, 1990
  • Cricostoma Mørch, 1857
  • Ezolittorina Habe, 1958
  • Litorina Menke, 1828
  • Littorelaea Leach, 1847
  • Turbinarius Duméril, 1806

Littorina is a genus of small sea snails, marine gastropod molluscs in the family Littorinidae, the winkles or periwinkles. [2]

These small snails live in the tidal zone of rocky shores.

Overview

Anatomy of Littorina

In Europe there are about nine species in this genus, one of which is the rough periwinkle, Littorina saxatilis (Olivi, 1792). Another closely related (supposed) species Littorina tenebrosa (Montagu 1802) was thought to be distinct because of its different ecological requirements, but current studies have shown that it is not at all clear whether the two are indeed separate species or whether L. tenebrosa is perhaps merely an ecotype (an ecological form) of L. saxatilis.[3]

Littorina has given its name to the Littorina Sea, the geologic precursor of the Baltic Sea.

Distribution

The periwinkles are found on the seashore in the littoral zone and sublittoral zone in all parts of the world. In the Baltic they live within the influence of freshwater, and frequently become distorted in consequence.

Description

The thick, pointed shell is turbinated and has few whorls. The aperture is rounded. The outer lip is acute. The columella is rather flattened and imperforate. The operculum is paucispiral. The lingual teeth are hooked and trilobed. The uncini (small teeth on the radula) are hooked and dentated. [4]

Species

The type species:Turbo littoreus Linnaeus, 1758 restricts the species in this genus to the northern hemisphere, moderate and cold zones. The tropical species belong in other genera of the same family [5]

Species in the genus Littorina include [2]

Species brought into synonymy

References

  1. ↑ Férussac A. É d'A de (1822). H.N. g. et p. Moll., Tabl. gén., xxxiv.
  2. 1 2 3 WoRMS (2011). Littorina Férussac, 1822. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138135 on 2011-04-15
  3. ↑ Gosling, E.M. (2002). The periwinkle as a model in biodiversity studies: a geneticist's view. in Marine Biodiversity in Ireland and Adjacent Waters. Ulster Museum. publication no. 8
  4. ↑ George Washington Tryon, Structural and systematic conchology, 1882
  5. ↑ Bandel, K. & D. Kadolsky (1982). Western Atlantic Species of Nodolittorina (Gastropda: Prosobranchia): comparative morphology and its functional, ecological, phylogenetic and taxonomic implications. Veliger 25 (1): 1-42.
  6. ↑ S T Williams, D G Reid, D T J Littlewood (2003). "A molecular phylogeny of the Littorininae (Gastropoda: Littorinidae): unequal evolutionary rates, morphological parallelism, and biogeography of the Southern Ocean.". Mol Phylogenet Evol. 1 (1): 60–86. doi:10.1016/S1055-7903(03)00038-1. PMID 12801472.

External links

Media related to Littorina at Wikimedia Commons

This article is issued from Wikipedia - version of the Tuesday, October 27, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.