|
Syrnola Pyramidalis
''Syrnola'' is a genus of sea snails, marine (ocean), marine gastropod molluscs in the subfamily Turbonillinae of the family (biology), family Pyramidellidae, the pyrams and their allies.Bouchet, P.; Gofas, S. (2011). ''Syrnola'' A. Adams, 1860. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138419 on 5 February 2012 General description The species in ''Syrnola'' are medium-sized and slender. Their shell is subulate and polished, marked by fine lines of growth and microscopic spiral striations. It doesn't contain an Umbilicus (mollusc), umbilicus. The Whorl (mollusc), whorls of the teleoconch are flattened and increasing regularly in size. The Suture (anatomy), suture is well marked. The Aperture (mollusc), aperture is suboval. The Lip (gastropod), outer lip is simple. They possess only one Columella (gastropod), columellar fold. Species Species within the genus ''Syrnola'' include: * ''Syrnola acerrima'' Watson, 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, ostracum, is typically made of calcium carbonate (CaCO3) precipitated into an organic matrix ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
