enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Radula - Wikipedia

    en.wikipedia.org/wiki/Radula

    The cephalopod radula rarely fossilizes: it has been found in around one in five ammonite genera, and is rarer still in non-ammonoid forms. Indeed, it is known from only three non-ammonoid taxa in the Palaeozoic era: Michelinoceras , Paleocadmus , and an unnamed species from the Soom Shale .

  3. Odontophore - Wikipedia

    en.wikipedia.org/wiki/Odontophore

    Muscles that control the radula are shown in brown. The surface of the radula ribbon, with numerous teeth, is shown as a zig-zag line. The odontophore is part of the feeding mechanism in molluscs. It is the cartilage which underlies and supports the radula, a ribbon of teeth. [1] The radula is found in every class of molluscs except for the ...

  4. Cephalopod - Wikipedia

    en.wikipedia.org/wiki/Cephalopod

    Cephalopod radulae are known from fossil deposits dating back to the Ordovician. [103] They are usually preserved within the cephalopod's body chamber, commonly in conjunction with the mandibles; but this need not always be the case; [104] many radulae are preserved in a range of settings in the Mason Creek. [105]

  5. Neocephalopoda - Wikipedia

    en.wikipedia.org/wiki/Neocephalopoda

    Neocephalopoda was a new name for a group that had been recognized previously and called Angusteradulata (Lehmann, 1967), based on a discovery of an ammonoid radula similar to modern coleoids. It was contrasted with the Lateradulata, which included the nautilus and most fossil nautiloids.

  6. Mollusca - Wikipedia

    en.wikipedia.org/wiki/Mollusca

    Cephalopods are primarily predatory, and the radula takes a secondary role to the jaws and tentacles in food acquisition. The monoplacophoran Neopilina uses its radula in the usual fashion, but its diet includes protists such as the xenophyophore Stannophyllum . [ 45 ]

  7. Nautilus - Wikipedia

    en.wikipedia.org/wiki/Nautilus

    The radula is wide and distinctively has nine teeth. ... Certain species reached over 2.5 m (8 ft) in size. The other cephalopod subclass, Coleoidea, diverged from ...

  8. Hyaline shield - Wikipedia

    en.wikipedia.org/wiki/Hyaline_shield

    The hyaline shield (hy.sh.) attached to an Octopus radula.Scale bar: 0.5 mm. The hyaline shield is a part of the radula in many kinds of molluscs.It serves as an attachment point for the muscles that retract the radula, and is thus located on the upper surface of the radula, arching backwards into the mouth.

  9. Uroteuthis chinensis - Wikipedia

    en.wikipedia.org/wiki/Uroteuthis_chinensis

    U. chinesis is a cephalopod which means that it feeds by using tentacles to pull food into its sharp beak. Cephalopods have radula's which are similar to tongues that help them grind up the food they eat so they can digest it. Reproduction occurs once in a lifetime because cephalopods die shortly after reproducing.