title: [Muscle formation in the sexual genetation of Intoshia variabili (Orthonectida)].
abstract: Muscle formation in Intoshia variabili (Orthonectida) has been studied in the course of development of the sexual (free-living) specimen. The muscle system originates in the early embryogenesis as a distinct continuous layer located between the outer cell layer and the inner cell mass. Later this cell layer disintegrates into separate muscle strips. The presence of a distinct muscle system in Orthonectida and the pattern of its development evidences for placing this group into Triploblastica rather than into Diploblastica.
authors.forename: G S
authors.initials: GS
authors.lastname: Sliusarev
mesh_terms: D000818:Animals; D007448:Invertebrates / Q000196:embryology* / Q000254:growth & development; D009132:Muscles / Q000196:embryology*