Mammoth snail
| Mammoth snail | ||||||||||||
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Housing by Ryssota otaheitana |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Ryssota otaheitana | ||||||||||||
| ( Férussac , 1821) |
The mammoth snail ( Ryssota otaheitana , Syn . : Ryssota ovum ( Valenciennes 1854)) is a Filipino land snail belonging to the genus Ryssota .
features
The shell of this land snail can reach a diameter of 70-100 mm. It varies in color from pale horn colored to maroon brown. In some subspecies the apex is lighter than the base of the case, in others it is the other way around and in some the tip and base of the case are colored the same. The aperture (opening) is large, its inside is white, bluish white or bluish white with a purple hue. Spiral grooves are usually present.
distribution
Ryssota otaheitana is endemic to the Philippines . Their distribution is limited to Luzon , and according to Faustino (1930) also to Panay ( Visayas ).
Way of life
Ryssota otaheitana is nocturnal and occurs at the base of trees or on their buttress roots , under leaves and on the underside of fallen branches and on weathered rock, where it is well camouflaged by its color and difficult to find. It depends on moisture and that is why the rainy season is frequent. During the dry season, it is more likely to be found in wetlands and cooler places. The stock is threatened by forest fires and over-collection.
Taxonomy
The species was described in 1821 by André Étienne d'Audebert de Férussac under the name Helix otaheitana .
use
In the Philippines, the mammoth snail is used as food and as an additive to animal feed. Your snail shell (mostly brown-white colored, approx. 10 cm in diameter) is often offered as a decorative item.
literature
- Abbott, RT (1989): Compendium of Landshells. A color guide to more than 2,000 of the World's Terrestrial Shells. 240 pp. American Malacologists. Melbourne, Fl, Burlington, Ma. ISBN 0-915826-23-2
Web links
- Ryssota otaheitana at WMSD - Worldwide Mollusc Species Data Base
- http://www.schnecken-und-musugeln.de/galerie/galerie_helicarionidae.htm
- Image of a mammoth snail
Individual evidence
- ↑ a b c d A promising component in Philippine agroforestry: a land snail called bayuku ( Ryssota ovum ) ( Online )
- ↑ WMSD - Worldwide Mollusc Species Data Base
- ^ Paul Bartsch: A Synopsis of the Philippine Land Mollusks of the Subgenus Ryssota. In: Proceedings of the Biological Society of Washington Vol. 51, pp. 101–120, 1938 ( Online ; PDF; 16.6 MB)
- ↑ Species taxon summary otahietana Férussac, 1821 described in Helix at AnimalBase, Zoological Institute of the University of Göttingen
- ↑ André Étienne d'Audebert de Férussac and Gérard Paul Deshayes: Histoire naturelle générale et particulière des mollusques terrestres et fluviatiles, tant des espèces que l'on trouve aujourd'hui vivantes, que des dépouilles fossiles de celles qui n'existent plus; classés d'après les caractères essentiels que présentent ces animaux et leurs coquilles