Josephine's moon snail
| Josephine's moon snail | ||||||||||||
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Housing by Neverita Josephinia |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Neverita josephinia | ||||||||||||
| Risso , 1826 |
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The Josephines moon screw or Josephines umbilical screw ( Neverita josephinia ) is a screw from the family of the moon screw extending from molluscs fed. It lives in the Mediterranean and adjacent areas of the Atlantic .
features
The hemispherical, very crooked and flattened snail shell of Neverita josephinia , which in adult snails can be up to 2.8 cm long and up to 3.6 cm in diameter, has a smooth, shiny surface and clearly visible growth lines. The whorls of the thread are very flat. The circumference of the body is strongly rounded from the middle and gradually over into the very wide, funnel-shaped umbilicus, the middle of which is completely filled by a thick, semi-cylindrical bulge, which only rarely partially fills the enlarged part of it. The case mouth is very crooked and half egg-shaped. The surface of the case is colored flesh-red and turns bluish. The seam is surrounded by a yellowish band. The top and base of the house are whitish, the top of the throat is reddish brown. The umbilical bulge is pale brownish flesh-colored. The honey-colored operculum of the Josephine moon snail is thin and horny.
The snail's mesopodium and propodium are completely white and almost completely cover the snail shell up to the top when crawling. The mesopodium is about twice as wide as the snail shell and widens towards the rear. The propodium is approximately the length of the case.
The collar-shaped clutches of the separate-sex Josephine moon snail, formed from sand and jelly, have a diameter of about 5 to 6 cm. The development of the larval stages takes place in the tiny egg capsules, each of which contains an egg. The hatching young animals, finished snails, have a shell length of about 780 μm.
Distribution and way of life
The Josephine moon snail occurs in the Mediterranean . There it is very common on sandy soils. It lives in the intertidal zone and below at depths of up to 20 meters. Like other moon snails feed on Neverita josephinia of clams and snails . The prey is grasped with the foot and a hole is drilled in the shell with the radula .
literature
- Betty Jean Piech: Naticidae and Personidae: A Classification of Recent Species . Delaware Museum of Natural History, Wilmington, DE 1998, 60 pp.
Individual evidence
- ↑ Rodolfo Amando Philippi: The genera Neverita and Amaura . Systematic Conchylia Cabinet. Nuremberg, 1852. p. 40. No. 38. Natica Josephiniana (Neverita) Risso .
- ↑ MEC Giglioli: The Egg Masses of the Naticidae (Gastropoda) . Journal of the Fisheries Research Board of Canada, 1955, 12 (2): 287-327, 10.1139 / f55-018
Web links
- Fischhaus Zepkow: Family Naticidae - moon snails
- Thomas Huelsken, Carina Marek, Stefan Schreiber, Iris Schmidt, Michael Hollmann (2008): The Naticidae (Mollusca: Gastropoda) of Giglio Island (Tuscany, Italy): Shell characters, live animals, and a molecular analysis of egg masses (PDF; 1.2 MB) . Zootaxa 1770: 1-40 (2008). Neverita josephinia , pp. 18f.
- Naticidae , p. 598ff. Neverita josephinia (Risso, 1826) , p. 604 (French, on the FAO website). JM Gaillard: Gasteropodes (p. 514ff.). From: W. Fischer, M. Schneider, M.-L. Bauchot: Guide FAO d'Identification des Espèces pour les Besoins de la Pêche. Mediterranée et Mer Noire . Organization des Nations Unies pour l'Alimentation et l'Agriculture, Rome, 1987.
- World Register of Marine Species , World Marine Mollusca database: Neverita josephinia (Risso, 1826)