Summary
The pineal parenchyma of the dogfish Scyliorhinus canicula contains sensory (receptor) cells and supporting cells. The ultrastructural characteristics of these cells are described. The sensory cell is a photoreceptor-like cell the outer segment of which is, however, often irregularly developed. Neuropil-like areas are present but no typical synapses have been observed. The classification of pineal receptor cells is discussed.
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Work done with the aid of a research scholarship from the Alexander von Humboldt Foundation, Bad Godesberg, Germany. — The electron microscope used in this study was placed at the disposal of Professor Oksche by the Deutsche Forschungsgemeinschaft. — The animal material was provided by the Stazione Zoologica di Napoli, Italy.
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Rüdeberg, C. Receptor cells in the pineal organ of the dogfish Scyliorhinus canicula linné. Z. Zellforsch. 85, 521–526 (1968). https://doi.org/10.1007/BF00324745
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DOI: https://doi.org/10.1007/BF00324745