Structure of the pineal organ of the sardine, Sardina pilchardus sardina (Risso), and some further remarks on the pineal organ of Mugil spp.

  • Claes Rüdeberg


The pineal organ of the sardine, Sardina pilchardus sardina, was investigated light and electron microscopically. The pineal parenchyma contains sensory cells, supporting cells, and ganglion cells, and the overlying tissues appear specialized for light penetration. The ganglion cells are arranged in 3 groups, their axons giving rise to the tractus epiphyseos. The sensory cell is of a photoreceptor type found in several other teleost species. No definitive evidence of a secretion was educed but some indications of an endocrine function are reported and discussed.

The pineal receptor cell of neonates of Mugil spp. which have a pigment-free spot above the pineal organ, was investigated electron microscopically and found to have the same organization as that of adult Mugil auratus.


Ganglion Cell Receptor Cell Overlie Tissue Endocrine Function Sensory Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1967

Authors and Affiliations

  • Claes Rüdeberg
    • 1
    • 2
  1. 1.Istituto di Anatomia Comparata „Battista Grassi“ dell'Università di RomaItalia
  2. 2.Zoological InstituteLundSweden

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