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Body Whorl
The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the body whorl, or last whorl, is the most recently formed and largest whorl (or revolution) of a spiral or helical shell, terminating in the aperture. It is called the "body whorl" because most of the body of the soft parts of the animal fits into this whorl. The proportional size of the body whorl in gastropod shells differs greatly according to the actual shell morphology. For shells in which the rate of whorl expansion of each revolution around the axis is very high, the aperture and the body whorl are large, and the shell tends to be low spired. The shell of the abalone is a good example of this kind of shell. The opposite tendency can sometimes create a high spire with very little whorl increase per revolution. In these instances, e.g. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarebia Granifera Shell
''Tarebia'' is a genus of freshwater snails, gastropod mollusks in the subfamily Thiarinae of the family (biology), family Thiaridae. Species Species within the genus ''Tarebia'' include: * † ''Tarebia acuta'' (J. Sowerby, 1822) * † ''Tarebia bojolaliensis'' (K. Martin, 1905) * † ''Tarebia cardinalis'' (Lapparent, 1938) * † ''Tarebia cerithioides'' (Rolle, 1858) * † ''Tarebia darmavangiensis'' (K. Martin, 1905) * ''Tarebia granifera'' (Lamarck, 1816) * ''Tarebia hainesiana'' * † ''Tarebia issiracensis'' (Fontannes, 1884) * ''Tarebia invieta'' * ''Tarebia lateritia'' * ''Tarebia luzoniensis'' * † ''Tarebia preangerensis'' (K. Martin, 1905) * ''Tarebia semigranosa'' * † ''Tarebia trimargaritifera'' (Ludwig, 1865) ;Synonyms: * ''Tarebia obliquegranosa'' (E.A. Smith, 1878): synonym of ''Tarebia granifera'' (Lamarck, 1816) (a junior synonym) References External links Adams, H. & Adams, A. (1853-1858). The genera of Recent Mollusca; arranged according to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
