polyspondyly

polyspondyly
1) notochord surrounded by many serially arranged calcified rays, in effect having several centra e.g. Chimaera has 5-9 centra, Amia has 2 in the caudal region
2) calcified rings around the notochord at intervals which do not seem to correspond in a regular way to the placement of body segments, found in some Chondrichthyes

Dictionary of ichthyology. 2009.

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Look at other dictionaries:

  • polyspondyly — poly·spon·dy·ly …   English syllables

  • polyspondyly — noun see polyspondylic …   Useful english dictionary

  • polyspondylic — adjective for polyspondyly …   Dictionary of ichthyology

  • polyspondylous — adjective for polyspondyly …   Dictionary of ichthyology

  • polyspondylous vertebra — vertebra showing polyspondyly (1) …   Dictionary of ichthyology

  • vertebra polyspondyla — (plural vertebrae polyspondylae)) polyspondylous vertebra (vertebra showing polyspondyly, the notochord surrounded by many serially arranged calcified rays, in effect having several centra e.g. Chimaera has 5 9 centra, Amia has 2 in the caudal… …   Dictionary of ichthyology

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