Triton snail with knots

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Triton snail with knots
Housing made by Charonia lampas

Housing made by Charonia lampas

Systematics
Partial order : Littorinimorpha
Superfamily : Cassoidea
Family : Triton snails (Ranellidae)
Subfamily : Cymatiinae
Genre : Charonia
Type : Triton snail with knots
Scientific name
Charonia lampas
( Linnaeus , 1758)

The knot-bearing triton snail or the knot-bearing conch ( Charonia lampas ) is a snail from the family of the Triton snail (genus Charonia ) that feeds on echinoderms . It lives in the Atlantic and Mediterranean and is one of the largest snails living today.

features

The conical snail shell of Charonia lampas , which in adult snails reaches about 33 cm, sometimes 40 cm, in island locations only 20 cm in length, has a moderately high, pointed thread with 8 to 9 convex passages with spiraling belts and mostly rows of Knots are provided. The body is wide and takes up about two thirds of the total height. Except in very young animals, the tip of the housing is usually worn out. The large egg-shaped opening has a pronounced rim of the mouth. The outer lip is flaming and thickened at the edge with inner teeth. The downwardly wrinkled spindle has 2 to 3 protruding folds, the raised edge of which can extend over the siphon channel. The surface of the house is white and red-brown cloudy or flamed jagged running down with spirally running bands of light spots at the nodes and dark brown in between, next to them with medium brown bands. The edge of the mouth is white with dark brown teeth on the outer lip and a brownish to reddish color on the edge of the wrinkle of the spindle.

The animal is brownish red or vivid orange with dense darker spots. The antennae have two black rings.

The operculum of the knot-bearing Triton snail is narrowly egg-shaped and has a shiny, smooth brown bulge on the underside.

distribution

The knot-bearing triton snail occurs in the eastern Atlantic from the English Channel to Morocco and occasionally off Angola , the Canary Islands , Madeira and the Azores , in the western Atlantic on the coast of Brazil , on some deep-sea mountains and in the western part of the Mediterranean . There are also isolated populations, possibly subspecies, in the Pacific Ocean around Australia , Taiwan and Japan . In the eastern Mediterranean and parts of the Atlantic, it is replaced by the Atlantic triton snail ( Charonia variegata ).

habitat

Charonia lampas lives below the intertidal zone at depths of 8 to 50 meters, also on coral reefs and deep-sea mountains .

Life cycle

Like other triton snails , nodal tritons are separate sexes. The Veliger larvae go through a pelagic phase of several months as zooplankton before they metamorphose into a finished snail .

nutrition

The nocturnal Charonia lampas feeds on echinoderms , especially starfish . With the snail's acidic saliva, the prey animals are paralyzed and their calcareous skeletons softened.

Danger

Because of the imposing housing, the knot-bearing triton snail is collected so that humans can be considered a main enemy. The populations in the Mediterranean are protected according to the Federal Species Protection Ordinance ( Appendix 1 ) and the Bern Convention . In terms of global hazard, however, it is not included in the Red List.

literature

  • Betty Jean Piech: Ranellidae and Personidae: A Classification of Recent Species. Delaware Museum of Natural History, Wilmington Del. 1995, OCLC 33600855 , p. 60.
  • Frank Riedel: Origin and evolution of the "higher" Caenogastropoda. Berliner Geoscientific Abhandlungen, Series E, Volume 32, Berlin 2000, ISBN 3-89582-077-6 , p. 240.

Individual evidence

  1. ↑ a b c d World Register of Marine Species , World Marine Mollusca database: Charonia lampas (Linnaeus, 1758)
  2. ^ C. Brüggemann (1838): The natural history in faithful illustrations and with a detailed description of the same. Eduard Eisenach publisher, Leipzig 1838. The molluscs. P. 73 f. The knot-bearing conch. Murex Tritonium nodiferus.
  3. ↑ a b image: Triton (Charonia lampas) preying on Starfish (Certonardoa semiregularis), Japan ( Memento from January 16, 2013 in the web archive archive.today )
  4. ↑ Image: Charonia lampas lampas (Linnaeus, 1758), Fundación Luz-Teno, Tenerife
  5. ↑ Sealifebase: Charonia lampas (Linnaeus, 1758)
  6. ^ JH Laxton: Feeding in some Australasian Cymatiidae (Gastropoda: Prosobranchia). In: Zool. J. Linn. Soc. 50, 1971, pp. 1-9, doi : 10.1111 / j.1096-3642.1971.tb00748.x .
  7. ↑ In Appendix 1 (to § 1) of the Federal Species Protection Ordinance, the knot-bearing Triton snail is listed under the name Charonia rubicunda , which, according to WoRMS, is a synonym for Charonia lampas .
  8. ↑ Fischhaus Zepkow: Family Ranellidae - Triton snails

Web links

Commons : Knot-bearing triton snail ( Charonia lampas )  - Collection of images, videos and audio files