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An Hermaphrodite Specimen of the Spider Crab Hy as Coarctat Us Leach

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image of Crustaceana

L'auteur passe en revue les cas d'hermaphrodisme précédemment observés chez les Décapodes. Il décrit un spécimen d'un crabe Oxyrhynche (Hyas coarctatus) qui semble être le seul cas signalé d'un Brachyure présentant à la fois les appareils sexuels mâle et femelle sur les deux côtés du corps. On observe des orifices génitaux mâles et femelles, des ovaires normaux et des gonoductes mâles très réduits. Les pléopodes abdominaux sur les segments 1 et 2 sont de type mâle normal, alors que, sur les segments 3 à 5, il y a trois paires de pléopodes réduits de type femelle.

Affiliations: 1: Marine Biological Station, Port Erin, Isle of Man.


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