Onychogomphus styx Pinhey, 1961
Northern Dark Claspertail
Type locality: Bwamba [= Semliki] Forest, Uganda
Male is similar to O. seydeli and other dark supinus-group Onychogomphus species by (a) labrum black; (b) face sometimes all pale, but usually at least postclypeus partly dark; (c) broadly black on humeral stripe, this area at least as wide as flanking pale stripes; (d) all tibiae all black; (e) foliations on S8-9 about equally deep. However the taxonomy of these species is unresolved and O. styx is thought to range from Kenya and W Tanzania to Uganda. [Adapted from Dijkstra & Clausnitzer 2014]
Rivers, but possibly also streams, in open areas in forest, but possibly also shaded. Probably often with a sandy bottom. From 600 to 1600 m above sea level.
Appendages (dorsal view)
Appendages (lateral view)
Map citation: Clausnitzer, V., K.-D.B. Dijkstra, R. Koch, J.-P. Boudot, W.R.T. Darwall, J. Kipping, B. Samraoui, M.J. Samways, J.P. Simaika & F. Suhling, 2012. Focus on African Freshwaters: hotspots of dragonfly diversity and conservation concern. Frontiers in Ecology and the Environment 10: 129-134.
- Pinhey, E.C.G. (1961). A survey of the dragonflies (order Odonata) of eastern Africa. British Museum, London, 1-214.
Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2021-01-27].