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The jaw is opposite to the radula and reinforces part of the foregut. [2] The more purely carnivorous the diet, the more the jaw is reduced. [2] There are often pieces of food in the gut corresponding to the shape of the jaw. [2] The jaw structure can be ribbed or smooth:
A snail is a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name snail is also used for most of the members of the molluscan class Gastropoda that have a coiled shell that is large enough for the animal to retract
Tanychlamys indica, also known as the horntail snail [1] is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk, in the family Ariophantidae. Distribution [ edit ]
Fun fact: blue whales are 16 times bigger than a human. The post 50 Animals So Giant It’s Hard To Believe They’re Real (New Pics) first appeared on Bored Panda.
Shell of marine snail Lunella torquata with the calcareous operculum in place Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place. An operculum (Latin for 'cover, covering'; pl. opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also ...
Iwasaki's snail-eater snake (Pareas iwasakii) is a snail-eating specialist; even newly hatched individuals feed on snails. It has asymmetric jaws, which facilitates feeding on snails with dextral (clockwise coiled) shells. A consequence of this asymmetry is that this snake is much less adept at preying on sinistral (counterclockwise coiled) snails.
Revolving lines – Spiral lines on a snail shell which run parallel with the sutures. [1] Rhombic – Having four sides, the angles being oblique. [1] Rhomboid – Four-sided, but two of the sides being longer than the others. [1] Rimate – Provided with a very small hole or crack, as some snails in which the umbilicus is very narrowly open. [1]
Snail-eater in action Skull of Pareas iwasakii. P. iwasakii is a snail-eating specialist; [4] even newly hatched individuals feed on snails. [5] It has asymmetric dentition on its jaws, with more teeth on the right mandible (about 25 teeth compared to 15 teeth on the left mandible) which facilitates feeding on snails with dextral (clockwise coiled) shells. [6]