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Thylacodes Lamarckii
''Thylacodes'' is a genus of sea snails, marine gastropod mollusks in the family Vermetidae, the worm snails or worm shells. The species in this genus were previously placed in the genus ''Serpulorbis''. Unlike some other vermetids, the species in this genus have no operculum. Like other vermetids, the species in this genus do not have regular shell coiling like that of a typical gastropod shell, instead they have shells which are irregular. They are usually cemented onto a hard surface. Because of all this, the shells resemble the calcareous tubes of worms in the polychaete family Serpulidae. Species Species within the genus ''Thylacodes'' include: *''Thylacodes adamsii'' ( Mörch, 1859) *'' Thylacodes aotearoicus'' (J. E. Morton, 1951) *''Thylacodes arenarius'' ( Linnaeus, 1758) *''Thylacodes aureus'' (Hughes, 1978) * ''Thylacodes borshenglyuhrurngae'' K.-Y. Lai, 2018 *''Thylacodes capensis'' (Thiele, 1925) *''Thylacodes colubrinus'' ( Röding, 1798) *''Thylacodes con ... [...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] |
