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A typical radula comprises a number of bilaterally-symmetrical self-similar rows of teeth rooted in a radular membrane in the floor of their mouth cavity. Some species have teeth that bend with the membrane as it moves over the odontophore, whereas in other species, the teeth are firmly rooted in place, and the entire radular structure moves as one entity.
Unlike other Aeolidida, the family Aeolidiidae possesses radular teeth which aid in feeding on their prey (See Fig. 2). [7] The radula is a feature in majority of mollusks located in the mouth, like a tongue, containing thousands of teeth that help cut up food for digestion by scraping against rocks or even Fig. 2 A. papillosa Radular Teeth
Cone snails use a harpoon-like structure called a radula tooth for predation. Radula teeth are modified teeth, primarily made of chitin and formed inside the mouth of the snail, in a structure known as the toxoglossan radula. Each specialized cone snail tooth is stored in the radula sac, except for the tooth that is in current use. [13]
The teeth are attached to a membrane pulled across a surface by inner mouth muscles. The teeth attach to that membrane then tears through the algae or seaweed on that surface and it is then brought into the mouth. [11] Their radula is used for a herbivorous diet, specialized to remove algae and slice seaweed. They have a 6.1.0.1.6 radular ...
The radular teeth of chitons are made of magnetite, and the iron crystals within these may be involved in magnetoreception, [32] the ability to sense the polarity and the inclination of the Earth's magnetic field. Experimental work has suggested that chitons can detect and respond to magnetism. [33]
The teeth are composed of goethite, an iron-based mineral, woven in a particular way into grouped 1μ thick bundles. [ 8 ] [ 9 ] Many limpets create a home "scar" on the rock to which they always return between tides, the scar provides excellent protection from predators as well as helping to prevent dehydration during low tides.
The morphological variability comes from their radular teeth, ceratal arrangement, and rhinophore ornamentation which make it very difficult to tell them apart. [5] Berghia have dense rhinophores which are long tentacles that function as chemo-receptors to locate food sources that are far away. [12]
The buccal mass is the first part of the digestive system, and consists of the mouth and pharynx. The mouth includes a radula, and in most cases, also a pair of jaws.The pharynx can be very large, especially in carnivorous species.