Allocreadium sudanensissp. nov. is described from a cyprinid fish (Barbus bynni) from the White Nile in the Sudan. The new species is compared with other related species ofAllocreadium.A key for identification of five African species of the genusAllocreadiumis given.The present material was collected by the senior author in January, 1969 from the intestine of a cyprinid fish,Barbus bynni(Forskal), caught from the White Nile at Rabag near Kosti (about 200 miles to the south of Khartoum) in the Sudan. Eighteen trematodes, collected from a single infected fish, were fixed in hot 70% alcohol. Examination of these specimens in whole mounts stained in aceto-alum carmine and in sectioned material revealed that they belong to a hitherto unknown species of trematodes belonging to the genusAllocreadium, Looss (1900) which is described here asAllocreadium sudanensissp.

Internal anatomy of the common carp Farag et al.

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