caudal vertebra
one of the posterior vertebrae lacking ribs, found behind the abdominal vertebrae and extending to the tail, each with a ventral haemal arch, canal and spine. The first caudal vertebrae is near the internal, dorsal tip of the first anal proximal pterygiophore. Note that there are some transitional vertebrae with a rib or reduced remnant of a rib and a haemal arch or an incomplete haemal arch

Dictionary of ichthyology. 2009.

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  • caudal vertebra — noun one of 4 vertebrae in the human coccyx • Syn: ↑coccygeal vertebra • Hypernyms: ↑vertebra • Part Holonyms: ↑coccyx, ↑tail bone …   Useful english dictionary

  • Vertebra — Ver te*bra, n.; pl. {Vertebr[ae]}. [L. vertebra, fr. vertere to turn, change. See {Verse}.] [1913 Webster] 1. (Anat.) One of the serial segments of the spinal column. [1913 Webster] Note: In many fishes the vertebr[ae] are simple cartilaginous… …   The Collaborative International Dictionary of English

  • Caudal vertebrae — are the bones in the tails of mammals. [http://trc.ucdavis.edu/mjguinan/apc100/modules/Musculoskeletal/skeleton/vert2/vert5.html] See Vertebra …   Wikipedia

  • Vertebra — A vertebra (plural: vertebrae ) is an individual irregular bone in the spinal or vertebral column ( aka ischis), a flexuous and flexible column that is a defining characteristic of vertebrate animals.There are normally thirty three (33) vertebrae …   Wikipedia

  • vertebra dissospondyla — (plural vertebrae dyssospondylae)) dyssospondylous vertebra (vertebra in Amia, Lepisosteidae and Acipenseridae where the pleurocentrum, intercentrum, basidorsal, basiventral, interdorsal and interventral all ossify but remain independent in the… …   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

  • vertebra praeuralis — (plural vertebrae praeurales)) preural vertebra (one of a series of vertebrae preceding the ural vertebrae and distinguished by lacking hypurals. They precede the bifurcation of the caudal artery. Called PU1, PU2, etc counted anteriorly from the… …   Dictionary of ichthyology

  • Vertebra — A vertebra is one of 33 bony segments that form the spinal column of humans. There are 7 cervical, 12 thoracic, 5 lumbar, 5 sacral (fused into one sacrum bone) and 4 coccygeal (fused into one coccyx bone). * * * One of the segments of the spinal… …   Medical dictionary

  • vertebra diplospondyla — (plural vertebrae diplospondylae)) diplospondylous vertebra (the double vertebrae formed when the anterior and posterior elements (sclerotomes) have not fused, e.g. caudal vertebrae of Amia. Two types of centra are present, a precentrum lacking… …   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

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