Coryphagrion grandis is a species of damselfly found in coastal forests and on the lower slopes of the Eastern Arc Mountains in Kenya, Tanzania and Mozambique.Clausnitzer, V. 2010. Coryphagrion grandis. The IUCN Red List of Threatened Species. Version 2014.2. Downloaded on 29 August 2014. Its monotypic genus Coryphagrion is a member of the family Coenagrionidae. It was once placed within the family Pseudostigmatidae, whose other members are all Neotropical, but further studies showed this family was paraphyletic.
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