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A new glandular sensory organ in interstitial Macrostomida (Turbellaria): I. Ultrastructure
Rieger, R.M.; Tyler, S. (1974). A new glandular sensory organ in interstitial Macrostomida (Turbellaria): I. Ultrastructure. Mikrofauna des Meeresbodens, 42. Akademie der Wissenschaften und der Literatur: Mainz. ISBN 3-515-01896-4. 1-41 (137-175) pp.
Part of: Mikrofauna des Meeresbodens. Akademie der Wissenschaften und der Literatur: Wiesbaden. ISSN 0342-3247, more
Peer reviewed article  

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    Intertidal environment; Ultrastructure; Macrostomida [WoRMS]; Marine
Author keywords
    Sensory organs

Authors  Top 
  • Rieger, R.M.
  • Tyler, S.

    A glandular sensory organ found in the rear body tip of several species of interstitial macrostomid turbellarians is described using electron microscopy and phase contrast microscopy. The organ, referred to as the caudal sensory organ, consists of several large and bulbous primary sensory cells arranged in one or two grape-like clusters lying deep in the parenchyme of the animal at the end of a canal that connects each cluster with the external environment. Each of these bulbous sensory cells bears a single non-motile cilium which extends through the canal joining the cilia of the other sensory cells and emerging through the external opening of the canal in a long trailing ciliar tuft. The bulbous sensory cells have an extensive endoplasmic reticulum and golgi complex and are evidently glandular, perhaps releasing a pheromonal or defensive secretion, as well as being sensory. Other cells, making up the canal, are thought to be sensory also. The caudal sensory organ is innervated by two large nerves from the main lateral body nerves of the animal. Its occurrence and possible function is discussed in relation to life in the interstitial environment.

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