horny teeth

horny teeth
keratinous, conical teeth derived from the epidermis in Petromyzontidae

Dictionary of ichthyology. 2009.

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  • pharyngeal teeth — teeth on the pharyngeal bones. May be placed in a dorsal and ventral pair, as in most teleost fishes, or in laterally opposing pairs, one set on each side, as in Cyprinidae and Catostomidae. The upper pharyngeal teeth are located on a dentigerous …   Dictionary of ichthyology

  • gill teeth — pharyngeal teeth (teeth on the pharyngeal bones. May be placed in a dorsal and ventral pair, as in most teleost fishes, or in laterally opposing pairs, one set on each side, as in Cyprinidae and Catostomidae. The upper pharyngeal teeth are… …   Dictionary of ichthyology

  • throat teeth — pharyngeal teeth (teeth on the pharyngeal bones. May be placed in a dorsal and ventral pair, as in most teleost fishes, or in laterally opposing pairs, one set on each side, as in Cyprinidae and Catostomidae. The upper pharyngeal teeth are… …   Dictionary of ichthyology

  • agnathan — /ag neuh theuhn/, n. 1. any member of the vertebrate class Agnatha. adj. 2. agnathous. [AGNATH(A) + AN] * * * ▪ fish Introduction   any member of the group of primitive, jawless fishes (fish) that includes the lampreys (lamprey) (order… …   Universalium

  • gastropod — /gas treuh pod /, n. 1. any mollusk of the class Gastropoda, comprising the snails, whelks, slugs, etc. adj. 2. Also, gastropodous /ga strop euh deuhs/. belonging or pertaining to the gastropods. [1820 30; < NL Gast(e)ropoda a class of mollusks.… …   Universalium

  • fish — fishless, adj. /fish/, n., pl. (esp. collectively) fish, (esp. referring to two or more kinds or species) fishes, v. n. 1. any of various cold blooded, aquatic vertebrates, having gills, commonly fins, and typically an elongated body covered with …   Universalium

  • Fish — /fish/, n. Hamilton, 1808 93, U.S. statesman: secretary of state 1869 77. * * * I Any of more than 24,000 species of cold blooded vertebrates found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes… …   Universalium

  • hagfish — /hag fish /, n., pl. (esp. collectively) hagfish, (esp. referring to two or more kinds or species) hagfishes. any eellike, marine cyclostome of the order Myxiniformes, having undeveloped eyes, a barbel rimmed, circular mouth, and horny teeth for… …   Universalium

  • lamprey — /lam pree/, n., pl. lampreys. any eellike marine or freshwater fish of the order Petromyzoniformes, having a circular, suctorial mouth with horny teeth for boring into the flesh of other fishes to feed on their blood. Also called lamprey eel,… …   Universalium

  • radula — radular, adj. /raj oo leuh/, n., pl. radulae / lee /. a chitinous band in the mouth of most mollusks, set with numerous, minute, horny teeth and drawn backward and forward over the floor of the mouth in the process of breaking up food. [1745 55;… …   Universalium

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