preural vertebra
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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
ultimate vertebra — terminal vertebrae (the last complete centrum of the vertebral column; not homologous across taxa because of varying fusions of preural and ural centra and so of little utility) … 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
opisthure — 1) the tip of the vertebral column which protrudes beyond the caudal fin, e.g. in larval Elasmobranchii 2) urostyle (1) the small upturned posterior tip of the vertebral column, generally formed of a slender, pointed rod of cartilage, or fused… … Dictionary of ichthyology
urostyle — 1) the small upturned posterior tip of the vertebral column, generally formed of a slender, pointed rod of cartilage, or fused vertebrae and associated elements (in homocercal caudal fins of Teleostomi) 2) the fan like series of bones… … Dictionary of ichthyology
terminal vertebrae — the last complete centrum of the vertebral column; not homologous across taxa because of varying fusions of preural and ural centra and so of little utility. Also called ultimate vertebra … Dictionary of ichthyology
