Casmaria ponderosa
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Casmaria ponderosa , Thelma Dias, Brazil, 2010 |
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| Casmaria ponderosa | ||||||||||||
| ( Link , 1807) |
Casmaria ponderosa is the name of a snail from the family of helmet snails (genus Casmaria ), which is common in the Red Sea and the Indo-Pacific andfeeds on sea urchins .
features
The rather heavy shell of Casmaria ponderosa has whorls with a spiral row of brown spots in front of the seam and another at the base of the whorl. The shoulder around the body has strong nodular axial folds. The outer lip of the case mouth is thick and shiny with a series of pointed teeth along its entire edge. The spindle has a strong callus with a few short folds in the lower part of the inner margin. The shiny surface of the case is cream-colored or dark yellow to light brown, the inside of the case mouth is brown. The house becomes up to 6 cm long in adult snails. The snail's mantle and foot are white so that the dark eyes are clearly visible on the lower third of the antennae.
distribution and habitat
Casmaria ponderosa is distributed in the Red Sea and the Indo-Pacific from the Mascarene Mountains to Hawaii .
The snail lives in coral reefs on sand and is nocturnal, but occasionally appears during the day, usually in the shelter of large green algae of the genus Halimeda .
Life cycle
Like other helmet snails, Casmaria ponderosa is separate sexes. The male mates with the female with his penis . The female lays the gray eggs in clusters of numerous horny egg capsules. This is followed by a pelagic phase of the Veliger larvae from hatching from the egg capsule to metamorphosis to the finished snail.
food
Casmaria ponderosa feeds on sand-digging sea urchins , namely heart urchins , which it usually hunts at night.
literature
- Marc Hughes: Hawaiian Gastropod Echinovores: The Hunting and Feeding Techniques of Casmaria ponderosa, Charonia tritonis, and Tonna perdix (PDF; 1.3 MB). Hohonu - A Journal of Academic Writing, Volume 1, Number 1, Hilo / Hawaiʻi 2003, pp. 7-8.
Web links
- Casmaria flammea (Linnaeus, 1758) Flame Helmet. Jaxshells.com. Casmaria flammea (Linnaeus, 1758) Flame Helmet Feeding On Sea Urchin. Photographed by Linda Ianniello while SCUBA diving in Lake Worth Lagoon near Peanut Island, Palm Beach Inlet, Palm Beach Co., Florida 8/18/2012 | Underwater photograph copyright 2012 by Linda Ianniello.
- Fischhaus Zepkow: Family Cassidae - Helmet snails
- Underwater Kwajalein: Casmaria ponderosa (Linnaeus, 1758) , catching prey , with egg clutch
- Cassidae - Helmet and bonnet shells (identification key for the helmet snails , English, on the FAO website ), p. 534: Casmaria ponderosa (Linnaeus, 1758). 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.
Individual evidence
- ^ Alan G. Jarrett: Marine Shells of the Seychelles. Carole Green Publishing, 2000. p. 45.
- ↑ a b c d Underwater Kwajalein: Casmaria ponderosa (Linnaeus, 1758). January 10, 2011 / July 10, 2014; accessed on April 22, 2018.
- ↑ Jean Drivas, Maurice Jay: Coquillages de La Réunion et de l'Ile Maurice. Collection Les Beautés de la Nature, Delachaux et Niestlé, Neuchâtel 1987. ISBN 2-603-00654-1
- ^ Barry Wilson: The Biogeography of the Australian North West Shelf: Environmental Change and Life's Response. Newnes, 2013. p. 193.