title: Sense receptors with electron-dense supporting structures, and centrioles in the nerve fibres of Gieysztoria and Rhinolasius (Platyhelminthes, Rhabdocoela).
abstract: The ultrastructure of two types of sense receptors each is described for Gieysztoria and Rhinolasius. In Gieysztoria, one receptor possesses a number of long microvilli, a cilium with a cross-striated rootlet, a septate desmosome, and an electron-dense band apical to the desmosome. The band forms a complex reticulate extension into the base of the receptor. The second receptor is without microvilli, has a cilium with a long cross-striated rootlet, and a septate desmosome with a short basal electron-dense extension or extensions which do not form a complete ring. In Rhinolasius, one receptor possesses a short bulbous cilium without a rootlet, with a septate desmosome of the pleated sheet (comb) type and a weakly developed electron-dense band beneath it. The second receptor has a long cilium with cross-striated rootlet, and a septate desmosome with a weakly developed electron-dense band apical to it. Centrioles were found in nerve fibres of both species.
authors: Department of Zoology, University of New England, Armidale, NSW, Australia.
authors: K
authors: K
authors: Rohde
authors: L R
authors: LR
authors: Cannon
authors: N
authors: N
authors: Watson
mesh_terms: D000818:Animals; D002502:Centrioles / Q000648:ultrastructure*; D008854:Microscopy, Electron; D009412:Nerve Fibers / Q000648:ultrastructure*; D010802:Phylogeny; D010986:Platyhelminths; D011984:Sensory Receptor Cells / Q000648:ultrastructure*