Preston, H.B. (1912). Diagnoses of new species of terrestrial and fluviatile shells from British and German East Africa, with the description of a new genus (Eussoia) from the Eusso Nyiro River, B.E. Africa. Proceedings of the Zoological Society of London, 80 (1): 183-193, pl. 31-33. London. [13 March].[details]