existence starts during or after
start stage
parhypural
TAO:0000438
ZFA:0000562
phy
parhyural
Hemal arch and spine of preural centrum 1. The parhypural is defined as the most posterior hemal arch with an open canal through which the dorsal aorta passes.
zebrafish_anatomy
ZFA:0000438
specialized hemal arch and spine
larval:day 5