title: On the ultrastructure of the polycercus larva of Paricterotaenia paradoxa (Cestoda: Cyclophyllidea).
mesh_terms: D000818:Animals; D002589:Cestoda / Q000648:ultrastructure*; D007814:Larva / Q000648:ultrastructure; D008854:Microscopy, Electron; D009835:Oligochaeta / Q000469:parasitology