ural vertebra
ural vertebra
"Vertebra that is incomplete or rudimentary and may bear a rudimentary neural arch and sometimes a rudimentary spine or the neural arch and spine are completely absent. Ural vertebrae are one of the last bony elements of the vertebral column, usually smaller than the preural centra. Ural vertebrae are numbered beginning from anterior (1) to posterior (2, 3, 4, etc.). Ural vertebra is an unpaired median bone."