Turricula nelliae
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Housing of Turricula nelliae |
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| ( EA Smith , 1877) |
Turricula nelliae ( original combination : Pleurotoma nelliae ) is a snail from the family of the leg worm , which in the Indo-Pacific is widespread and polychaete (Polychaeta) eats.
features
The spindle-shaped to tower-shaped snail shell of Turricula nelliae with 12 highly hollowed passages at the top reaches a length of about 3 to 4 cm in adult snails. A series of upright, elongated tubercles run along the base, and two small keels run below the suture. The housing mouth together with the siphon channel takes up almost half of the housing length. The anterior canal is straight, the siphonal canal a little crooked and curved backwards. The upper part of the thin outer lip of the case mouth is slightly cut.
distribution and habitat
Turricula nelliae is distributed in the Indo-Pacific from Pakistan , India and Sri Lanka via Indonesia to the Philippines , China , Japan and Australia ( Northern Territory , Queensland , Western Australia ). It lives below the intertidal zone down to a depth of about 30 m on muddy surfaces.
Development cycle
Like all leg snails , Turricula nelliae is of separate sexes. The Veliger larvae swim free before they sink and metamorphose into crawling snails .
nutrition
Turricula nelliae feeds on sedentary Vielborstern (Polychaeta), where Lagis koreni is one of the favorite prey animals and in studies in Hong Kong accounted for a quarter of all eaten animals, but also 15 other Polychaetenarten were eaten. The prey animals are stung with the help of the radula teeth and paralyzed by the snail's venom.
literature
- Edgar Albert Smith (1877): Diagnoses of new species of Pleurotomidae in the British Museum. The Annals and Magazine of Natural History (Zoology, Botany), ser. 4, vol. 19, p. 489.
- John A. Miller: The feeding and prey capture mechanism of Turricula nelliae spurius (Hedley) (Gastropoda: Turridae). In: Brian Morton (Ed.): The Marine Flora and Fauna of Hong Kong and Southern China II: Behavior, morphology, physiology and pollution. Hong Kong University Press, 1990, pp. 979-992.
Web links
- Fischhaus Zepkow: Family Clavatulidae - leg snails
- Clavatulidae. From: JM Poutiers: Gastropods . In: Kent E. Carpenter, Volker H. Niem (Eds.): FAO Species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 1: Seaweeds, corals, bivalves and gastropods. Food and Agriculture Organization of the United Nations, Rome, 1998. pp. 629-631.