Platynereis developmental stage
A Platynereis developmental stage is an occurrent that is a temporal subdivision of a Platynereis dumerilii development.
PD_ST:0000090
http://purl.obolibrary.org/obo/PD_ST_0000090
Developmental stages are typically demarcated by the timing of appearance, loss or transformation of specific anatomical structures.
PLATY:T_Henrich