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Ultrastructure and function of the gut of a marine bryozoan
Gordon, D.P. (1975). Ultrastructure and function of the gut of a marine bryozoan. Cah. Biol. Mar. 16(3): 367-382 (4plates)
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keyword
    Marine

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  • Gordon, D.P.

Abstract
    The inversed cerebral eye of T. rattus is formed of one sensory neuron and of one accessory cell containing many pigment bodies. These bodies are arranged in one single cupshapes layer. They display a perpetual turn-over. This eye is placed at the extremity of a retrocerebral gland, and is in relation with the brain. These functions are discussed. An original pattern of photoreceptor structure is described. The lamellar rhabdomeric disposition is only found in the 2 ocelli observed so far in Aschelminths. Nevertheless, the eye of Trichocerca rattus appears different: lamellae are piled up in the cytoplasm of the sensory neuron and are inserted on the main dendritic stem of this neuron. Some periodic submembranar structures are placed inside of lamellar rhabdomeres. They may be related with the photopigments.

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