Zygonoides occidentis (Ris, 1912)
Congo Riverking

Synonyms:

  • scientific: Olpogastra fuelleborni Grünberg, 1902 ssp. occidentis

Type locality: Kinshasa, DRC

Diagnosis

Male is similar to Z. fraseri by (a) green eyes; (b) S3 with broadly pale base, never pruinose; (c) pale central band on S7 widest dorsally or of even width throughout. However, differs by (1) ranging from central Congo Basin possibly to Nigeria; (2) larger size, Hw 44-45 mm; (4) labrum and genital lobe largely black rather than pale; (5) Hw base blackish like membranule; (6) Abd dark aside from conspicuous pale bands on S3 and S7; (7) cerci all black, rather than with pale dorsal spot at base. [Adapted from Dijkstra & Clausnitzer 2014]

Habitat description

Rivers in open areas in forest. Probably especially faster sections (rapids, falls). From 300 to 400 m above sea level, but possibly up to 700.

Distribution

confirmed: Democratic Republic of the Congo; Nigeria

Abdomen (lateral view)

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.


Reference

  • Ris, F. (1931). Odonata aus Süd-Angola. Revue Suisse Zoologie, 38, 97-112. [PDF file]

Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2019-08-25].