Heliogomphus walli, or Wall's grappletail, is a species of dragonfly in the family Gomphidae. It is endemic to Sri Lanka. It is also known as Wall's round-tip clubtail in some texts.Odonata: Catalogue of the Odonata of the World. Tol J. van, 2008-08-01
See also List of odonates of Sri Lanka
References
walli.html World Dragonflies Animal diversity web IUCN Red List Query Results Sri Lanka Biodiversity List of odonates of Sri Lanka