title: [Ultrastructure of the surface complex of acanthocephalans with the example of Filicollis anatis (Palaeacanthocephala: Polymorphidae) and Neoechinorhynchus crassus (Eoacanthocephala: Neoechinorhynchidae)].
abstract: Fine morphology of external tegument (surface complex) of young and mature acanthocephalans Filicollis anatis and young Neoechinorhynchus crassus is described. Based on comparative analysis of the obtained results and literature data, the surface complex of all examined acanthocephalans is shown to have principally similar structure at all stages of life cycle. Differences between species examined are found in quantitative characters only and they are related either to age or ecology of worms (embryonic larvae).
authors.affiliation: nikishin@ibpn.kolyma.ru
authors.forename: V P
authors.initials: VP
authors.lastname: Nikishin
mesh_terms: D000049:Acanthocephala / Q000033:anatomy & histology / Q000254:growth & development / Q000648:ultrastructure*; D000818:Animals; D034582:Integumentary System / Q000254:growth & development; D007814:Larva