preceded_by Platynereis life cycle stage small atokous worm stage large atokous worm stage Developmental stage following Small atokous worm stage with the following key events: Tubicolous worm with more than 50 segments. Sexually immature atokous worms start to produce gametes in the coelom. Growth rate slows until they possess up to 70 segments and the gametes start to mature within the body cavity. PdumDv:0001540 l atok platynereis_stage