Zygonyx eusebia (Ris, 1912)
Imperial Cascader

Type locality: Pweto [locality doubted because of Sapho male], DRC

Diagnosis

Male overlaps with Z. atritibiae and Z. regisalberti and is similar by (a) dorsum of thorax with pale cross-band anterior to antealar sinus; (b) hind femora and often tibiae (partly) brown; (c) anterior denticles on femora directed towards base. However, differs by (1) great size, Hw 54-61 mm; (2) all pale rather than black labrum; (3) uniformly pale sides of thorax; (4) 5-6 cell-rows between anal loop and tornus; (5) 18½-20½ Ax in Fw. [Adapted from Dijkstra & Clausnitzer 2014]

Habitat description

Not known well, but probably rivers or streams in open areas in forest. Probably often with a sandy and/or soft (like muddy) bottom. Inferred to occur from 200 to 1500 m above sea level.

Distribution

confirmed: Angola; Democratic Republic of the Congo; Zambia


Male © KD Dijkstra


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.


References

  • Ris, F. (1912). Libellulinen 6. Fasc. XIV in Collections Zoologiques du Baron Edm. de Selys Longchamps. Brussels : Institut royal des Sciences naturelles de Belgique, 14, 701-836.
  • Pinhey, E.C.G. (1964). Dragonflies (Odonata) of the Angola-Congo borders of Rhodesia. Publicacoes culturais Companhia Diamantes Angola, 63, 95-130. [PDF file]
  • Pinhey, E.C.G. (1961). Dragonflies (Odonata) of Central Africa. Occasional Papers Rhodes-Livingstone Museum, 14, 1-97. [PDF file]
  • Longfield, C. (1959). The Odonata of N. Angola. Part II. Publicacoes culturais Companhia Diamantes Angola, 45, 13-42. [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/ [2017-10-17].