posterior lateral line primordium
http://purl.obolibrary.org/obo/UBERON_2001157
http://purl.obolibrary.org/obo/UBERON_2001156
http://purl.obolibrary.org/obo/UBERON_2001471
http://purl.obolibrary.org/obo/UBERON_2000228
http://purl.obolibrary.org/obo/UBERON_0004121