The umbrellar growth process in the leptomedusae Phialidium hemisphaericum (syn. Campanularia johnstoni).
D000818:Animals; D002455:Cell Division; D002470:Cell Survival; D003063:Cnidaria / Q000254:growth & development*; D004396:Coloring Agents; D046508:Culture Techniques
D004396:Coloring Agents