Tonna pennata: Difference between revisions
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== Description == |
== Description == |
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This shell varies in colour from beige to dark brown, and the whitish markings are quite variable, which may account for the large number of [[synonym]]s that exist. The shell is pear-shaped, with a blunt apex; the wide, flared aperture with a thin lip occupies about three quarters of the length of the shell. The [[Umbilicus (mollusc)|umbilicus]] is open and the [[Columella (gastropod)|columella]] twisted. The surface of the shell is finely striated, with shallow grooves between the ribs. The largest [[Whorl (mollusc)|whorl]] has about twenty ribs, and there is no [[Operculum (gastropod)|operculum]]. The maximum [[gastropod shell|shell]] length is about {{convert|15|cm|in|0|abbr=on}}. In living animals, the [[Mantle (mollusc)|mantle]] is white with brown markings, and flares widely.<ref name=Doris/> |
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The maximum recorded [[gastropod shell|shell]] length is 158 mm. |
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==Distribution and habitat== |
==Distribution and habitat== |
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Revision as of 21:12, 10 January 2021
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| Species: | T. pennata
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Tonna pennata is a species of large sea snail, a marine gastropod mollusc in the family Tonnidae, the tun shells.[2] It is commonly known as the Atlantic partridge tun.[3]
Description
This shell varies in colour from beige to dark brown, and the whitish markings are quite variable, which may account for the large number of synonyms that exist. The shell is pear-shaped, with a blunt apex; the wide, flared aperture with a thin lip occupies about three quarters of the length of the shell. The umbilicus is open and the columella twisted. The surface of the shell is finely striated, with shallow grooves between the ribs. The largest whorl has about twenty ribs, and there is no operculum. The maximum shell length is about 15 cm (6 in). In living animals, the mantle is white with brown markings, and flares widely.[4]
Distribution and habitat
Tonna pennata is found in shallow water in the tropical western Atlantic Ocean, the Caribbean Sea and the Gulf of Mexico and in the eastern Atlantic in the Canary Islands, Madeira and the West African coast.[4] It is usually found in reef areas, on coral and rock, and in sandy areas and seagrass meadows.[3] The minimum recorded depth for this species is 0 m; the maximum recorded depth is 13 m.[5]
References
- ^ Mörch O. A. (1853). Catalogus Conchyliorum quae reliquit D. Alphonso D'Aguirra & Gadea, comes de Yoldi, regis Daniae cubiculariorum princeps, ordinis Dannebrogici in prima classe & ordinis Caroli Tertii eques. Fasciculus primus. Cephalophora. Haec conchylia publica auctione calendis octobribus dividentur. L. Klein, Copenhague Vol. 1 (1852), 170 p. vol. 2, [IV] + 76 p. [post 1 aprile 1853].
- ^ a b Tonna pennata (Mörch, 1853). Vos, C. (2009). Tonna pennata (Mörch, 1853). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=410165 on 9 July 2010 .
- ^ a b "Tonna pennata (Morch, 1852): Atlantic partridge tun". SeaLifeBase. Retrieved 10 January 2021.
- ^ a b Jeglot, Samuel; Muller, Yves (13 December 2021). "Tonna pennata (Mörch, 1853)" (in French). DORIS. Retrieved 10 January 2021.
{{cite web}}: CS1 maint: multiple names: authors list (link) - ^ 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.
- Vos, C. (2007) A conchological Iconography (No. 13) - The family Tonnidae. 123 pp., 30 numb. plus 41 (1 col.) un-numb. text-figs, 33 maps., 63 col. pls, Conchbooks, Germany