a form of early shark tooth, characteristically with a large central cusp, a broad base and smaller lateral cusps, found in sharks such as Cladodus from the Upper Devonian. See also diplodont, hybodont and symmorid

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • symmorid — a form of early shark tooth, similar to cladodont teeth with a main central cusp and smaller lateral cusps, but appearing later in the fossil record (late Devonian). See also diplodont, cladodont and hybodont …   Dictionary of ichthyology

  • Ctenacanthiformes — Sphenacanthus aus dem frühen Karbon von Schottland Zeitraum Mittleres Devon bis Trias Systematik …   Deutsch Wikipedia

  • Symmoriida — Lebendrekonstruktion von Symmorium sp. Zeitraum Oberdevon bis Oberkarbon Systematik …   Deutsch Wikipedia

  • diplodont — an early form of shark tooth, found in xenacanths for example, characteristically having two prongs or cusps. See also cladodont, hybodont and symmorid …   Dictionary of ichthyology

  • hybodont — a form of early (Devonian to Mesozoic) shark tooth, characteristically elongate, low in profile, with sinuous ridges and pierced by numerous nutrient canals. Named for the genus, Hybodus. See also cladodont, diplodont and symmorid …   Dictionary of ichthyology

  • 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

  • Glikmanius —   Glikmanius Rango temporal: Carbonífero …   Wikipedia Español

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.