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The radula (US: / ˈ r æ dʒ ʊ l ə /; pl.: radulae or radulas) [1] is an anatomical structure used by mollusks for feeding, sometimes compared to a tongue. [2] It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus .
Median – Middle, as the middle tooth on the radula. [1] Mesocene – The middle cusp on the teeth of the radula. [1] Monoecius – Having the sexes united in the same individual. [1] Multifid – Made up of many lobes or projections, as the cusps on some radulae. [1] Multispiral – Consisting of many whorls, as some fresh-water snails. [1]
Stylommatophora is the most diverse group of land snails and slugs. Pallial cavity forms a spacious, air-filled lung. Anus is located on the right side close to the pneumostome. Operculum is missing. Two pairs of tentacle are retractable and the posterior pair bears eyes on the tips. Radula typically has many small, quite uniform teeth per row.
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. Many carnivorous species have developed a proboscis, containing the oral cavity, radula, and part of the ...
Caenogastropoda is a taxonomic subclass of molluscs in the class Gastropoda.It is a large diverse group which are mostly sea snails and other marine gastropod mollusks, but also includes some freshwater snails and some land snails.
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Their radula is characteristic with narrow central teeth with three cusps. The wide lateral teeth show numerous ctenoid (= comblike) cusps. Snails in the family Fasciolariidae are carnivorous. They feed on other gastropods and on bivalves. Some also prey on worms and barnacles. The snails are gonochoristic, i.e. the individuals have just one ...
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