Trithetrum congoense (Aguesse, 1966)
- scientific: Sympetrum navasi Lacroix, 1921 ssp. congoense
Type locality: foret de la Tsiama, Congo
Male is similar to T. navasi by (a) body parts uniform: thorax unmarked; frons without band; mid and hind femur all black; S1-10 unmarked; (b) venation blackish; (c) Fw discoidal field 5-8 cells wide on wing border. However, differs by (1) entire body blackish, sometimes lightly pruinose; (2) lobe of hamule elongate, not angled anteriorly, its tip extending beyond genital lobe. [Adapted from Dijkstra & Clausnitzer 2014]
Mostly rivers, but also streams, standing waters and possibly flowing channels in marshes, in open areas in forest. Often with blackwater, usually with emergent vegetation. From 200 to 500 m above sea level.
Abdominal segment 2 (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.
- Aguesse, P. (1966). Contribution à la faune de Congo (Brazzaville) Mission A. Villiers et A. Descarpentries XXI. Odonates. Bulletin de l'Institut fondamental d'Afrique noire, 28, 783-797. [PDF file]
Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2021-10-20].