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Planorbis Atticus
''Planorbis'' is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails, or planorbids. All species in this genus have sinistral or left-coiling shells.Bouchet, P.; Rosenberg, G. (2014). Planorbis O. F. Müller, 1773. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=182692 on 2014-11-23 Description ''Planorbis'' shells are flat-coiled and sinistral. Distribution This genus has a worldwide distribution. It is known from the Jurassic to the Recent periods.(in Czech) Pek I., Vašíček Z., Roček Z., Hajn. V. & Mikuláš R.: ''Základy zoopaleontologie''. - Olomouc, 1996. 264 pp., . Species ;Extant species currently in ''Planorbis'' * '' Planorbis agraulus'' Bourguignat, 1864 * '' Planorbis atticus'' Bourguignat, 1852 * '' Planorbis carinatus'' O. F. Müller, 1774 * ''Planorbis cretensis'' Glöer & Hirschfelder, 2015 * '' Planorbis intermixtus'' ... [...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] |
Planorbis Cretensis
''Planorbis'' is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails, or planorbids. All species in this genus have sinistral or left-coiling shells.Bouchet, P.; Rosenberg, G. (2014). Planorbis O. F. Müller, 1773. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=182692 on 2014-11-23 Description ''Planorbis'' shells are flat-coiled and sinistral. Distribution This genus has a worldwide distribution. It is known from the Jurassic to the Recent periods.(in Czech) Pek I., Vašíček Z., Roček Z., Hajn. V. & Mikuláš R.: ''Základy zoopaleontologie''. - Olomouc, 1996. 264 pp., . Species ;Extant species currently in ''Planorbis'' * '' Planorbis agraulus'' Bourguignat, 1864 * '' Planorbis atticus'' Bourguignat, 1852 * '' Planorbis carinatus'' O. F. Müller, 1774 * '' Planorbis cretensis'' Glöer & Hirschfelder, 2015 * '' Planorbis intermixtus' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
