part of developmental process involved in reproduction cell development conidiophore development phialide development The process whose specific outcome is the progression of phialides over time, from its formation to the mature structure. Phialides are specialized cells that bud from the ends of metulae on the conidiophore tip. Chains of conidia, or asexual spores, develop from the phialide tips. development of secondary sterigmata mah biological_process GO:0070790 2009-07-08T02:32:30Z