existence starts during or after
start stage
surface structure
urogenital papilla
TAO:0001118
zebrafish_anatomy
genital papilla
UGP
A protuberance in front of the gential pore and behind the vent. Mature females have a well developed urogenital papillae whilst in mature males it is poorly developed.
anal papillae
ZFA:0001118
urogenital papillae
anal papilla
larval:day 6