Sand collar
As sand collars or English sand collars , zoology describes artfully constructed egg clusters (spawn) made of fine sand, which are built by various marine snail species such as limpets and moon snails . The tiny eggs are glued together to form a flat belt with the help of water-resistant gelatin and literally papered over with sand. The layers are then pinned together in two to a maximum of seven layers, straightened and rolled up until they form a simple to complex cone that is open at the top. The spawning belt then hardens, sunk slightly into the seabed , and thus protects the eggs. Depending on the type slip from the capsules pelagic up to several weeks until the metamorphosis of plankton living Veliger larvae (z. B. euspira nitida ) or finished small snails (z. B. Euspira Catena ).
literature
- Guido Pastorino, Andres Averbuj, Pablo E. Penchaszadeh: On the egg masses, eggs and embryos of Notocochlis isabelleana (d'Orbigny, 1840) (Gastropoda: Naticidae) from northern patagonia. In: Malacologia , 2009, 51/2, pp. 395-402, p. 399.
- Alfred Goldsb Mayer: Sea Shore Life . Kessinger Publishing, 2005, ISBN 1419106678 , p. 141.
- Blair E. Witherington, Dawn Witherington: Seashells of Georgia and the Carolinas: A Beachcomber's Guide . Pineapple Press Inc, Sarasota (Florida) 2011, ISBN 1561644978 , p. 14.
