Ceriagrion annulatum Fraser, 1955
- scientific: Argiocnemis umbargae Pinhey, 1970
Type locality: Elisabethville [locality doubted], DRC
Male is similar to C. rubellocerinum by (a) head may blacken with age, at least S3-6 usually largely black with maturity, but at least S8-10 remain red; (b) humeral and metapleural sutures with dark dots in fossae (may disappear with darkening of body); (c) Pt rhomboidal, anterior border shorter than posterior; (d) penis with small horn-like cone on each side of base of apex; (e) apex of S10 with thick black denticles, these often merged to form thick black ridge or cluster; (f) cerci broad, wider than long, often overlapping each other (dorsal view); (g) paraprocts without heel (lateral view). However, differs by (1) labrum and thorax orange; (2) eyes all green in life; (3) Pt red rather than blackish; (4) apical excision of S10 shallowly triangular, each side with cluster of 2-3 merged thick black denticles (dorsal view); (5) black tooth placed outward from internal corner of cerci (dorsal view). [Adapted from Dijkstra & Clausnitzer 2014]
Standing and often temporary waters shaded by forest. Often with emergent vegetation, usually with coarse detritus. From 0 to 800 m above sea level, but possibly up to 1300.
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.
- Fraser, F.C. (1955). New species and new additions to the Odonata of the Belgian Congo. Revue Zoologie Botanique Africaines, 51, 33-43. [PDF file]
Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2021-12-02].