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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 .
Careoradula perelegans is a species of air-breathing land snail, terrestrial pulmonate gastropod mollusk in the family Streptaxidae. [2] [4] Careoradula perelegans is the only species in the genus Careoradula. [2] The generic name Careoradula consist of Latin word "careo", that means "lacking" and the word radula. [2]
The radula is taenioglossate, consisting of seven teeth per row: one middle tooth, flanked on each side by one lateral and two marginal teeth. The radula is used to scrape algae and detritus. Phlorotannins in the brown algae Fucus vesiculosus and Ascophyllum nodosum act as chemical defenses against L. littorea .
The radula in this species is longer than the shell itself. It contains 1,920 teeth in 160 rows of 12 teeth each. Patella vulgata is found attached to firm substrates from the high shore to the edge of the sublittoral zone, although it predominates in areas of wave action. Its shell is conical, up to around 6 cm long, and lacks defined chirality.
The monoplacophoran Neopilina uses its radula in the usual fashion, but its diet includes protists such as the xenophyophore Stannophyllum. [45] Sacoglossan sea-slugs suck the sap from algae, using their one-row radula to pierce the cell walls, [46] whereas dorid nudibranchs and some Vetigastropoda feed on sponges [47] [48] and others feed on ...
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Caenogastropoda can be divided into two major groups, based on the anatomy of the radula: Taenioglossa (from taenio meaning band), equivalent to the older Mesogastropoda, with typically seven teeth in each radular row. Stenoglossa (from steno meaning narrow), the Neogastropoda, with only 1–3 teeth per row.
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