Onychogomphus undecim Dijkstra, 2015
Type locality: Upemba NP, Lusinga, DRC
Male is typical of the supinus-group of the genus by (a) the rather straight cerci in lateral view with a strong inward-directed apical and subapical tooth visible in dorsal view; and (b) the elongate dorsal process at midlength of each branch of the epiproct. Nearest to the potentially sympatric O. supinus and O. kitchingmani by (c) the entirely pale face; (d) the black humeral stripe being narrower than the pale stripes bordering it; and (e) the tibiae with pale streaks. However, has (1) greater size, Hw 27.0-30.0 mm (n = 5) rather than 24.0-27.0 mm (n = 4); (2) an entirely pale costa contrasting with the black Pt, rather than a black costa anterior to a pale Pt; and (3) the foliations on S8 about one-sixth as deep as the segment is high, and deeper than those on S9, the latter with a concave border. The character of the costa and Pt is unique in the group, but recalls the genera Ceratogomphus and Crenigomphus. [Adapted from Dijkstra, Kipping & Mézière 2015]
Streams in open landscapes or shaded by gallery forest. Probably often with blackwater and a sandy bottom. From 1500 to 1900 m above sea level.
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.
- Dijkstra, K.-D.B., Mézière, N., and Kipping, J. (2015). Sixty new dragonfly and damselfly species from Africa (Odonata). Odonatologica, 44, 447-678.
Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2021-01-27].