Umma cincta (Hagen in Selys, 1853)
Type locality: Vane, Ghana
The only Umma species west of Nigeria but in central Africa overlaps with several species that are similar by (a) head, entire thorax and Abd green to blue metallic; (b) anterior face of basal segment of antenna at least partly dark; (c) Pt present and brown to black and at most slightly metallic; (d) legs and poststernum glossy dark brown to black. However, differs by (1) venation very dense, e.g. Fw quadrilateral with 9-12 cross-veins; (2) Pt poorly developed or tiny, 1 mm, rather rectangular due to straight proximal border; (3) cells between Pt and R2 distinctly deeper than long, sometimes split in two. [Adapted from Dijkstra & Clausnitzer 2014]
Streams shaded by forest, but sometimes in clearings. Mostly with a sandy and/or often gravelly bottom and probably submerged roots and/or coarse detritus. From 0 to 900 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.
- de Sélys-Longchamps, E. (1853). Synopsis des Caloptérygines. Bruxelles. Bulletins de l'Academie Royale des Sciences Belgique, 20, 1-73.
- Sjöstedt, Y. (1917). Odonaten aus Abessinien, Ost- und Westafrika. Arkiv Zoologi, 11, 1-27.
- Pinhey, E.C.G. (1962). Some records of Odonata collected in tropical Africa. Journal Entomological Society Southern Africa, 25, 20-50. [PDF file]
- Schouteden, H. (1934). Annales Musee Congo belge Zoologie 3 Section 2, 3, 1-84. [PDF file]
Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2018-06-24].