develops from OBO_REL:part_of (UNDECLARED) lateral line primordium posterior lateral line placode posterior lateral line primordium A migrating group of cells originating from the posterior lateral line placode. The primordium deposits seven to nine neuromasts and interneuromasts between them during its posterior migration to the tail. Gompel et al, 2001. TAO:0001157 posterior lateral line primordia teleost_anatomy posterior lateral line system