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Mesodon Altivagus
''Mesodon'' is a genus of land snails in the family Polygyridae. Species Species within the genus ''Mesodon'' include:ITIS''Mesodon'' accessed 1 November 2008. * '' Mesodon altivagus'' (Pilsbry, 1900) – wandering globe * '' Mesodon andrewsae'' Binney, 1879 – balsam globe * '' Mesodon clausus'' (Say, 1821) – yellow globelet * '' Mesodon elevatus'' (Say, 1821) – proud globe * '' Mesodon mitchellianus'' (I. Lea, 1839) – sealed globelet * '' Mesodon normalis'' (Pilsbry, 1900) – grand globe * '' Mesodon sanus'' (Clench & Archer, 1933) – squat globelet * ''Mesodon thyroidus ''Mesodon thyroidus'' is a species of air-breathing land snail, a terrestrial gastropod mollusk in the family Polygyridae Polygyridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily He ...'' (Say, 1816) – white-lip globe * '' Mesodon trossulus'' Hubricht, 1966 – dandy globelet * '' Mesodon zaletus' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a Gastropoda, gastropod or snail, 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, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
