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On Some Fresh and Brackish Water Crustaceans From Ceylon

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Parmi les cinq espèces de Crustacés que les auteurs ont signalées de Ceylan, deux sont nouvelles pour cette localité: Sesarma edwardsi crassimana De Man et Alitropus typus H. Milne Edwards. La seule différence entre nos exemplaires de Sesarma edwardsi crassimana et les syntypes porte sur la forme du premier pléopode du mâle. Nous croyons que cette différence peut indiquer deux phases sexuelles, c'est-à-dire une phase active et une phase inactive. Nous avons figuré les péreiopodes 3 à 5 de Caridina fernandoi Arudpragasam & Costa et indiqué quelques petites différences entre nos exemplaires et la description du type. Le péreiopode 2 d'Alitropus typus est aussi figuré; la forme des pattes antérieures semble être le seul caractère séparant le genre Alitropus du genre Rocinela.

Affiliations: 1: British Museum (Natural History), London, Great Britain; 2: University of Singapore, Malaya


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