autocentrum
an outer ring of cartilage in the vertebrae of Elasmobranchii interrupted by the neural and haemal arches

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • asterospondylous vertebra — a type of vertebra with radiating, star like calcifications extending to the chordacentrum and autocentrum, e.g. in some Elasmobranchii …   Dictionary of ichthyology

  • tectospondylous — a type of vertebral centra (and arches) with several concentric ossifications instead of just one, extending to the chordacentrum, arcocentrum and autocentrum. Found in skates and rays …   Dictionary of ichthyology

  • vertebra — (plural vertebrae)) bony or cartilaginous elements surrounding the notochord or replacing it and often protecting the spinal cord and caudal vein. Vertebrae are composed of a centrum formed from two pleurocentra and two intercentra or parts of… …   Dictionary of ichthyology

  • vertebra asterospondyla — (plural vertebrae asterospondylae)) asterospondylous vertebra (a type of vertebra with radiating, star like calcifications extending to the chordacentrum and autocentrum, e.g. in some Elasmobranchii) …   Dictionary of ichthyology

  • vertebra tectospondyla — (plural vertebrae tectospondylae)) tectospondylous vertebra (vertebral centra (and arches) with several concentric ossifications instead of just one, extending to the chordacentrum, arcocentrum and autocentrum. Found in skates and rays) …   Dictionary of ichthyology

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