Orthetrum guineense Ris, 1910
Guinea Skimmer

Type locality: Kongola [ass. Kongolo], DRC

Diagnosis

Male is similar to O. lusinga and O. machadoi by (a) generally found in more open habitats; (b) frons at most with dorsal dark markings running down onto shields; (c) 1 row in radial planate, sum of cell-doublings 0-10 [0-14]; (d) Pt not swollen, usually 12.5% of Hw length or less; (e) usually all (at least proximal) subcostal Ax pale; (f) Abd usually shorter than Hw (if longer, S4-6 with transverse bands); (g) metepimeral carina often marked with black line; (h) space between hook and lobe of hamule usually wide; (i) at least S4-7 with pale longitudinal streaks, at most S9-10 all dark, although marking on S8 can be tiny; cerci always at least partially dark. However, differs by (1) relatively larger size, Hw 26-34 mm; (2) labium often marked with black rather than all pale; (3) metepimeral carina marked with black line; (4) hook of hamule narrow rather than broad, and turned outward and with straight anterior border. [Adapted from Dijkstra & Clausnitzer 2014; this diagnosis not yet verified by author]

Habitat description

Streams, but possibly also rivers, in open landscapes or open areas in forest. Often with rocks and a soft (like muddy) bottom. From 0 to 2100 m above sea level, but mostly below 1800.

Distribution

confirmed: Angola; Benin; Botswana; Burkina Faso; Burundi; Côte d'Ivoire; Cameroon; Central African Republic; Congo-Brazzaville; Democratic Republic of the Congo; Ethiopia; Gabon; Ghana; Guinee-Bissau; Kenya; Liberia; Malawi; Mozambique; Namibia; Nigeria; Republic of Guinea; Republic of South Africa; Rwanda; Sierra Leone; Tanzania; Togo; Uganda; Zambia; Zimbabwe


Male © Jens Kipping


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.


Barcode specimen(s):


Adult, male; Angola, Uige Province, new campus site and environs © Dijkstra, K.-D.B.


Adult, male; Angola, Uige Province, new campus site and environs © Clausnitzer, V. & Dijkstra, K.-D.B.


Adult, female; Angola, Uige Province, new campus site and environs © Clausnitzer, V. & Dijkstra, K.-D.B.


Male; Democratic Republic of Congo, Katanga, Upemba National Park © Dijkstra, K.-D.B.


Male; Democratic Republic of Congo, Katanga, Upemba National Park © Dijkstra, K.-D.B.


Male; Liberia, Nimba County, East Nimba Nature Reserve © Dijkstra, K.-D.B.


Male; Tanzania, Kigoma Region, Lower Malagarasi Basin © Dijkstra, K.-D.B.


Male; Liberia, Nimba County, Mt Tokadeh © Dijkstra, K.-D.B.


Male; Gabon, Haut-Ogooué, Mounana-Lastoursville Road © Dijkstra, K.-D.B. & Nicolas Mézière


Male; Liberia, Nimba County, east of Gbapa © Dijkstra, K.-D.B.


Adult, male; Zimbabwe, Manicaland, Chimanimani National Park © Dijkstra, K.-D.B.

References

  • Ris, F. (1910). Libellulinen 2. Fasc. X in Collections Zoologiques du Baron Edm. de Selys Longchamps. Brussels : Institut royal des Sciences naturelles de Belgique, 10, 121-244.
  • Ris, F. (1921). The Odonata or Dragonflies of South Africa. Annals South African Museum, XVIII, 245-452. [PDF file]
  • Longfield, C. (1936). Studies on African Odonata, with synonymy and descriptions of new species and subspecies. Transactions Royal Entomological Society London, 85, 467-498. [PDF file]
  • Pinhey, E.C.G. (1961). Dragonflies (Odonata) of Central Africa. Occasional Papers Rhodes-Livingstone Museum, 14, 1-97. [PDF file]
  • Pinhey, E.C.G. (1966). Check-list of dragonflies (Odonata) from Malawi, with description of a new Teinobasis Kirby. Arnoldia, 2, 1-24. [PDF file]
  • Ris, F. (1931). Odonata aus Süd-Angola. Revue Suisse Zoologie, 38, 97-112. [PDF file]
  • Schouteden, H. (1934). Annales Musee Congo belge Zoologie 3 Section 2, 3, 1-84. [PDF file]
  • Lieftinck, M.A. (1969). Odonates Anisoptères - Odonata Anisoptera. Explor. hydrob. Lac Bangweolo and Luapula, 14, 1-64. [PDF file]
  • Pinhey, E.C.G. (1971). Odonata collected in Republique Centre-Africaine by R. Pujol. Arnoldia, 5, 1-16. [PDF file]
  • Schmidt, E. (1951). Libellen aus Portugiesisch Guinea, mit Bemerkungen über andere aethiopische Odonaten. Arquivos Museu Bocage, 20, 125-200. [PDF file]
  • Longfield, C. (1955). The Odonata of N. Angola. Part I. Publicacoes culturais Companhia Diamantes Angola, 27, 11-63. [PDF file]
  • D' Andrea, M., and Carfi, S. (1997). Nuove raccolte di odonati del Camerun con note su Agriocnemis maclachlani Selys, 1877 edescrizione di Agriocnemis dissimilis sp. nov. e Trithemis osvaldae sp. nov. Atti Societa italiana Scienze naturali, 136, 157-190. [PDF file]

Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2019-07-23].