the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Annelida > [noun] > member of > parts of > combining nephridium and coelomoduct (2)
mixonephridium1946
In many polychaetes: a combined nephridium and coelomoduct in which the coelomic end of the nephridium is completely fused with the coelomostome.