Zygonoides fraseri (Pinhey, 1956)
Northern Riverking

Synonyms:

  • scientific: Olpogastra fraseri

Type locality: Aswa river, Acholi, Uganda

Diagnosis

Male is similar to Z. occidentis 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 N Uganda to W Africa; (2) smaller size, Hw 40-44 mm; (3) labrum and genital lobe largely pale; (4) Hw base yellow, contrasting with dark membranule; (5) Abd with pale bands on S2-7; (6) cerci with pale dorsal spot at base. [Adapted from Dijkstra & Clausnitzer 2014]

Habitat description

Rivers shaded by gallery forest. Especially faster sections (rapids, falls), often with rocks. Recorded at around 100 m above sea level, but possibly up to 1200.

Distribution

confirmed: Côte d'Ivoire; Ghana; Uganda

Appendages (lateral view)

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

  • Pinhey, E.C.G. (1956). Some dragonflies of east and central Africa and a rarity from Mauritius. Occasional Papers Coryndon Memorial Museum, 4, 17-41. [PDF file]

Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2019-03-24].