hypural
Expanded and laterally flattened hemal arches and spines. They support the lepidotrichia of the caudal fin. The hypurals form ventral to the posterior tip of the dorsally-flexed notochord. In zebrafish condensation of the hypurals begins at approximately 6 dpf (4.1 mm NL, notochord length).
TAO:0000364
hypuralia
hyp
hypurals
ZFA:0000364
zebrafish_anatomy
specialized hemal arch and spine