Partridge barrel snail

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Partridge barrel snail
Tonna perdix, Lydekker R. (ed.) (1896). The royal natural history 6 (section 12): p. 382.

Tonna perdix , Lydekker R. (ed.) (1896). The royal natural history 6 (section 12): p. 382.

Systematics
Subordination : Hypsogastropoda
Partial order : Littorinimorpha
Superfamily : Cassoidea
Family : Barrel snails (Tonnidae)
Genre : Tonna
Type : Partridge barrel snail
Scientific name
Tonna perdix
( Linnaeus , 1758)
Spotted shape

The partridge barrel snail or partridge barrel snail ( Tonna perdix ) is a snail from the family of barrel snails (genus Tonna ) that is widespread in the Indo-Pacific . It feeds on sea ​​cucumber .

features

Brown shape

The egg-shaped, elongated, inflated snail shell of Tonna perdix has a brownish-red-yellow colored surface with white crescent-shaped spots and is drawn in rows like the feathers of partridges . Unlike Tonna galea, the conical thread protrudes clearly. As with all barrel snails, the casing is light, thin-walled and provided with convex ribs that follow the passageways so that the casing edge is wavy. They are close together. In fully grown snails, the house reaches around 15 cm, sometimes up to 23 cm in length. The foot is very large, the sipho long. The proboscis (trunk) is armed with hooks. The antennae have two ringlets, and the eyes sit on overgrown stems. The body is bluish white with reddish spots.

distribution

The partridge barrel snail is found in the Red Sea , in the Indian Ocean around Aldabra , Chagos , Madagascar , the Mascarene Islands , Mauritius and Tanzania as well as in the Pacific Ocean around New Zealand and the Galapagos Islands .

habitat

Partridge barrel snails prefer a sea depth of 5 to 10 meters and occur up to 20 meters deep.

food

Tonna perdix feeds on echinoderms . Preferred prey are sea ​​cucumbers , including several species of the genera Holothuria and Stichopus . The prey is anesthetized with the snail's acidic saliva and the calcareous skeleton is dissolved.

Individual evidence

  1. ^ C. Brüggemann (1838): The natural history in faithful illustrations and with a detailed description of the same. Eduard Eisenach publisher, Leipzig 1838. Die Weichthiere, p. 66. e) Tonne (Dolium). The Repphuhn (Buccinum s. Dol. Perdix L.)
  2. ↑ World Register of Marine Species , World Marine Mollusca database: Tonna perdix (Linnaeus, 1758)
  3. ^ Roy K. Kropp (1982): Responses of Five Holothurian Species to Attacks by a Predatory Gastropod, Tonna perdix . Pacific Science (1982), vol. 36, no. 4, pp. 445-452.

Web links

Commons : Partridge Barrel Slugs  - Collection of images, videos and audio files