Simnia spelta

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Simnia spelta
Simnia spelta (Linnaeus, 1758) 1.jpg
a live Simnia spelta on soft coral Leptogorgia sarmentosa
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Ovulidae
Genus: Simnia
Species:
S. spelta
Binomial name
Simnia spelta
Synonyms [1]
  • Amphiperas (Simnia) secale(G.B. Sowerby I, 1828)
  • Bulla spelta Linnaeus, 1758
  • Neosimnia spelta(Linnaeus, 1758)
  • Neosimnia spelta spelta(Linnaeus, 1758)
  • Ovula acicularis Tryon, 1885
  • Ovula intermedia Tryon, 1885 not Lamarck, 1810
  • † Ovula leathesisensu Tryon, 1885 not J. de C. Sowerby, 1824
  • Ovula luteaPallary, 1900
  • Ovula obsoleta Locard, 1892
  • Ovula roseaPallary, 1900
  • Ovula roseocarneaBucquoy, Dautzenberg & Dollfus, 1883
  • Ovula sowerbyanasensu Tryon, 1885 not Weinkauff, 1881
  • Ovula spelta(Linnaeus, 1758)
  • Ovula spelta var. luteaPallary, 1900
  • Ovula spelta var. lutea-roseaPallary, 1900
  • Ovula spelta var. lutea-roseocarneaBucquoy, Dautzenberg & Dollfus, 1883
  • Ovula triticeaLamarck, 1810 sensu Payraudeau, 1826 (misapplication)
  • Ovulum obtusumG. B. Sowerby I, 1828 (junior synonym)
  • Ovulum secaleG. B. Sowerby I, 1828 (junior synonym)
  • Phenacovolva (Pellasimnia) obtusa obtusa(G.B. Sowerby I, 1828)
  • Simnia nicaeensis Risso, 1826
  • Simnia nicaoensissensu J. Allan, 1956 not Risso, 1826 (misspelling [by Allan, J. 1956]...)
  • Simnia spelta var. brevisCoen, 1949

Simnia spelta is a species of sea snail, a marine gastropod mollusc in the family Ovulidae, the ovulids, which are cowrie allies sometimes called "false cowries". [1] It was first described in 1758 by the Swedish naturalist Carl Linnaeus.

Contents

Description

Simnia spelta shells. Naturalis Biodiversity Center - ZMA.MOLL.89415 - Simnia spelta (Linnaeus, 1758) - Ovulidae - Mollusc shell.jpeg
Simnia spelta shells.

Simnia spelta grows to a length of about 20 mm (0.8 in). The shell is roughly egg or cigar-shaped with a flattened base. It is strong, thick, smooth and glossy, with inrolled edges at the sides of the long aperture on the underside. The colouring varies according to the species of gorgonian on which it is living. [2] The background colour of the shell is white, yellow, pink or orange, often with white spots or dark spots, marbling or streaks, providing camouflage. As is commonly the case in Simnia species, the colour of all the visible soft parts normally matches the colour of the gorgonian on which the snail is grazing, as the pigment from the gorgonian is retained in the mantle of the mollusk. [2]

Distribution

Simnia spelta was at one time considered to be endemic to the western Mediterranean Sea and the Adriatic Sea, but it is now known to occur also in the eastern Atlantic Ocean between the Bay of Biscay, the Canary Islands and Angola. Its normal habitat is living on gorgonians, or sea fans, at depths down to about 10 metres (33 ft). [2]

Ecology

Simnia spelta is a specialist predator on gorgonians of the genera Eunicella , Paramuricea and Lophogorgia . It feeds on the polyps and the coenenchyme, the living connective tissue that surrounds the horny skeleton, but does not graze excessively and therefore does not kill its host. The sexes are separate in this species, and fertilisation is internal. Eggs are laid on the branches of the host species and resemble the natural warty appearance of the stems. [2]

The white gorgonian Eunicella singularis is one of the sea fans with which this snail associates. On this host the snail is normally white and mimics the twigs in appearance. It feeds and lays its eggs on the gorgonian branches. [3] Afterwards, epibionts grow on the denuded branches. [3]

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References

  1. 1 2 Simnia spelta (Linnaeus, 1758) . Gofas, S. (2010). Simnia spelta (Linnaeus, 1758). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=478341 on 5 June 2010 .
  2. 1 2 3 4 Reguieg, Aedwina; Sittler, Alain-Pierre; Müller, Yves (27 November 2014). "Simnia spelta (Linnaeus, 1758)". DORIS (in French). Retrieved 20 December 2014.
  3. 1 2 Dumas, Jacques; Maran, Vincent; Ader, Denis; Huet, Sylvie (27 January 2014). "Eunicella singularis (Esper, 1791)". DORIS (in French). Retrieved 20 December 2014.
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