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Observations on the ultrastructure of the proboscis epithelia in Polycystis naegelii Kölliker (Turbellaria Eukalyptorhynchia) and some associated structures
Schockaert, E.R.; Bedini, C. (1978). Observations on the ultrastructure of the proboscis epithelia in Polycystis naegelii Kölliker (Turbellaria Eukalyptorhynchia) and some associated structures. Acta Zool. Fenn. 154: 175-191
In: Acta Zoologica Fennica. Societas pro Fauna et Flora Fennica: Helsinki. ISSN 0001-7299, more
Peer reviewed article  

Also published as
  • Schockaert, E.R.; Bedini, C. (1978). Observations on the ultrastructure of the proboscis epithelia in Polycystis naegelii Kölliker (Turbellaria Eukalyptorhynchia) and some associated structures, in: Karling, T.G. et al. (Ed.) The Alex. Lüther Centennial Symposium on Turbellaria. Acta Zoologica Fennica, 154: pp. 175-191, more

Available in Authors 
    VLIZ: Open Repository 238834 [ OMA ]

Keywords
    Skin; Ultrastructure; Polycystis naegellii Kölliker, 1845 [WoRMS]; Marine

Authors  Top 
  • Schockaert, E.R., more
  • Bedini, C.

Abstract
    The epithelium of the anterior tip of the bodywall, of the proboscis cavity and of the proboscis cone in Polycystis naegelii has been studied with the electron microscope. These epithelia are formed by six syncytial belts separated from each other by cellular limits: one belt belongs to the epidermis, three line the cavity and two cover the cone. The posterior belt of the cavity and those of the cone are of the insunk type bringing about a peculiar relationship between the latter two. Moreover, they are associated with muscular elements under the basal cone belt but above its basement membrane. Nine different kinds of glands have been observed erupting at the surface of the epithelia in the studied area, while six different sorts of sensorial receptors are associated with them. Knowledge of the proboscis of Polycystididae from lightmicroscopy as well as some earlier electronmicroscopic observations on Turbellaria are commented on and some conclusions for the systematics discussed.

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