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  • Title: Fine structural observations on the ciliary receptors in the epidermis of three otoplanid species (Turbellaria proseriata).
    Author: Bedini C, Ferrero E, Lanfranchi A.
    Journal: Tissue Cell; 1975; 7(2):253-66. PubMed ID: 1145606.
    Abstract:
    In Notocaryoturbella bigermaria, Otoplana truncaspina and Paroto-planella heterorhabditica three types of epidermal receptors are recognized. Type I: with a single cilium running in a duct, piercing the distal dendrite process of the receptor. The internal wall of the dendrite process has eight ridges with longitudinal filaments lying inside them. The ciliary basal body lacks a longitudinal rootlet but is encircled by a thin annular formation. Type II: with a single (A) or several (B) cilia which protrude from the outer epithelial surface and are provided with a large and striped rootlet. Both types are considered as mechanoreceptors. Type III: with two or more short and stumpy cilia devoid of rootlets and displaying the usual 9 + 2 pattern in the proximal part only. They are considered as chemoreceptors.
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