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Fréquence et degré d'expression du pseudohermaphrodisme chez quelques prosobranches sténoglosses de la baie de Morlaix et de la Manche. 1. Situation au printemps de 1988 = Pseudohermaphrodism of some Stenoglossa prosobranchs species living in Morlaix Bay and in English Channel
Fioroni, P.; Stroben, E.; Oehlmann, J. (1991). Fréquence et degré d'expression du pseudohermaphrodisme chez quelques prosobranches sténoglosses de la baie de Morlaix et de la Manche. 1. Situation au printemps de 1988 = Pseudohermaphrodism of some Stenoglossa prosobranchs species living in Morlaix Bay and in English Channel. Cah. Biol. Mar. 32(3): 281-294
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Fioroni, P.
  • Stroben, E.
  • Oehlmann, J.

Abstract
    The frequency of the pseudohermaphroditism is analysed in 589 individuals of 5 prosobranch species of the Bay of Morlaix (namely Roscoff) and of the French coast of the Channel (Port-en-Bessin, Coutainville, Granville). The pseudohermaphroditism is demonstrated for the first time in Hinia (Nassarius) incrassata and confirmed for Roscoff in Nucella lapillus, Ocenebra erinacea, Buccinum undatum and Hinia (Nassarius) reticulata. Six different morphological types are distinguished and the differences of the species are described; the appearance of pseudohermaphroditic without a penis, but with a vas deferens of a various length is presented for the first time. The accentuated occurrence of the pseudohermaphroditism in marinas and ports, already known by the literature, is confirmed as well in respect to the percentual frequence as to the intensity of morphological expression.

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