Abstract
DURING the course of routine sampling of the gravel bottom fauna of the Sagana River (Kenya Colony), at an altitude of 5,865 ft. in connexion with fishery research on trout foods, it was noticed in 1948 that many nymphs of the ephemeropteran Afronurus peringueyi (E.-P.) had Simulium larvæ and pupæ attached to their backs. Examination of these pupæ by one of us (J. McM.) showed that they were of a species not hitherto described; and this species is not apparently found anywhere else in the river. 49 per cent of all Afronurus collected from all parts of the river between 5,900 and 5,600 ft. were found to have Simulium larvæ attached; pupæ are much more scarce.
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VAN SOMEREN, V., McMAHON, J. Phoretic Association between Afronurus and Simulium Species, and the Discovery of the Early Stages of Simulium neavei on Freshwater Crabs. Nature 166, 350–351 (1950). https://doi.org/10.1038/166350a0
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DOI: https://doi.org/10.1038/166350a0
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