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Remarques sur des Cnidaires du type de Microhydrula pontica Valkanov 1965, trouvés à Roscoff
Bouillon, J.; Deroux, G. (1967). Remarques sur des Cnidaires du type de Microhydrula pontica Valkanov 1965, trouvés à Roscoff. Cah. Biol. Mar. 8(3): 253-272
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keywords
    Microhydrula pontica Valkanov, 1965 [WoRMS]; Rhaptapagis cantacuzenei Bouillon & Deroux, 1967 [WoRMS]; Marine

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  • Bouillon, J., more
  • Deroux, G.

Abstract
    Two different forms of a small Cnidaria extremely reduced in his organisation and corresponding to the Hydrozoa Microhydrula pontica Valkanov 1965 are found during the whole year in the region of Roscoff on biological substratums which are developping at the surface in prolongated contact with the water. These two forms are distinguished by some histological characters, but especially by the cnidom. Each form has only one type of cnidocysts. The form which remains in the genus and species Microhydrula pontica has classical eurytelian microbasic cnidocysts; the other has a partiular type of cnidocysts, which have been described as 'semiophors'. The basal part is of the eurythelian microbasic type, but the filament is subdivided in two portions, separated by a elbow having a special spine as ornement. The genus and the species Rhaptapagis cantacuzenei n.g., n.sp. Are proposed for this form and the family of the Microhydrulidae has for the moment these two genus.

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