CAUDAL VERTEBRA
caudal vertebra: translation
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