Photoreceptor-like Cells in the Prostomium of a Scaleworm, Lepidonotus helotypus

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概要

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• Pear-shaped photoreceptor-like cells are widely scattered in the prostomial epithelium of the scaleworm, Lepidonotus helotypus. The cell is provided with cilia, the basal structure of which is situated beneath the cuticle. Having run inward through a narrow neck, ciliary sheaths soon branch out and form a bulbous mass of microvilli (phaosome) above the nucleus. No positive evidence was obtained as regards the continuity between the phaosome and the cell membrane but membranous clefts extending from either side are frequently observed. The cell is surrounded by supportive epithelial cells and also by presumably chemo- or mechanoreceptoral cells of low electron density. One of the two types of electrial responses to light which were recorded over the prostomial surface is considered to originate from extraocular receptors. The possibility of involvement of the photoreceptor-like cells in such responses is discussed.

• 社団法人日本動物学会の論文
• 1976-09-25

著者

• Gotow Takahiro

  Tamano Marine Laboratory Okayama University : (present Address) Department Of Anatomy Osaka Universi

関連論文

• Photoreceptor-like Cells in the Prostomium of a Scaleworm, Lepidonotus helotypus

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