title: [Ultrastructure and identification of giant muscular cells in certain proboscis worms of the family Polymorphidae].
abstract: The results of ultrastructure study of the giant muscular cells located at the base of proboscis receptacle are given. Peculiarities of cell ultrastructure suggest the presence of the "nuclear secretion" in these cells. By their location and morphological features they are identical to the retinacular cells formerly described by some authors.
authors.forename: V P
authors.initials: VP
authors.lastname: Nikishin
mesh_terms: D000049:Acanthocephala / Q000648:ultrastructure*; D000818:Animals; D009132:Muscles / Q000648:ultrastructure*