Macrogomphus annulatus, commonly known as Keiser's forktail, is a species of dragonfly in the family Gomphidae. It is native to India and Sri Lanka. Two subspecies are recognized, which are geographically separated.Odonata: Catalogue of the Odonata of the World. Tol J. van, 2008-08-01
Subspecies Macrogomphus annulatus annulatus Selys, 1854 – from India Macrogomphus annulatus keiseri Lieftinck, 1955 – from Sri Lanka
See also List of odonates of Sri Lanka List of odonates of India
References
Animal diversity web IUCN Red List Query Results