part of
develops from
ends during
starts during
hypochord
trunk somite 10
trunk somite 11
trunk somite 12
trunk somite 13
death
postcranial axial skeleton
urostyle
Skeletal element in the midline of the pelvic girdle that arises from somites 10-13. It is a rodlike caudal bony structure unique to anurans that lies within a compartment formed by the elongated, anteriorly oriented pelvic girdle. It is formed by the fusion of the neural arches of the 10th-13th vertebrae, and the posterior-most remnants of the hypochord. Timing of complete ossification varies between NF stages 62 and 66.
UBERON:0003106
XAO:0003080
xenopus_anatomy
bone element
NF stage 48