title: Observations on the envelope surrounding Moniliformis dubius (Acanthocephala) in the intermediate host, Periplaneta americana.
mesh_terms: D000049:Acanthocephala / Q000648:ultrastructure*; D000818:Animals; D003058:Cockroaches / Q000469:parasitology*; D007814:Larva / Q000254:growth & development / Q000648:ultrastructure; D008854:Microscopy, Electron; D008990:Moniliformis / Q000254:growth & development / Q000648:ultrastructure*