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Nerita Polita
''Nerita polita'' is a species of sea snail, a marine gastropod mollusk in the family Neritidae. The subspecies ''Nerita polita rumphii'' Récluz, 1841: synonym of '' Nerita litterata'' Gmelin, 1791 Description ''Nerita polita'' has a distinctively smooth and polished shell that is up to 4 cm in size. It has a smooth columella with 2-4 weak teeth on the edge. The color is variable: mottled grey, red or cream, sometimes with axial bands. The operculum is smooth, and is cream to black in color. Distribution The distribution of ''Nerita polita'' is summarized as Indo-Pacific (Richmond, 1997); and as tropical Indo-Pacific in Kalk (1958). Distribution of ''Nerita polita'' include: * Aldabra * Chagos * East Coast of South Africa * Kenya * Madagascar * Mascarene Basin * Mauritius * Mozambique * Red Sea * Tanzania Ecology The habitat of ''Nerita polita'' includes wet fine sandy shore and the littoral The littoral zone or nearshore is the part of a sea, lake, or river ... [...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] |
