Gynacantha (B) bullata Karsch, 1891
Black-kneed Duskhawker

Type locality: Chinchoxo, Angola [Cabinda Enclave]

Diagnosis

Male is similar to the widely co-occurring G. victoriae by (a) small size, Hw 35.0-44.0 mm; (b) pale legs with dark rings around the joints; (c) the absence of denticles in the posterior portion of the genital fossa border; and (d) the ventral carinae of S6-8 lacking denticles. However, has (1) the antennal sockets on the frons usually black like the adjacent vertex; (2) humeral sutures unmarked, at most with slight dark smudge at base; (3) thorax and Abd always green, without blue markings; and (4) longer cerci, 6.0-7.0 mm, over 3x as long as epiproct, about equal to length of S8-10 combined. [Adapted from Dijkstra & Clausnitzer 2014 and Dijkstra, Kipping & Mézière 2015]

Habitat description

Standing and mostly temporary waters shaded by forest. Usually with coarse detritus and mostly a soft (like muddy) bottom. From 0 to 2100 m above sea level, but mostly below 800, although possibly up to 2600.

Distribution

confirmed: Côte d'Ivoire; Cameroon; Central African Republic; Congo-Brazzaville; Democratic Republic of the Congo; Equatorial Guinea; Gabon; Ghana; Kenya; Liberia; Malawi; Nigeria; Republic of Guinea; Sierra Leone; Tanzania; Togo; Uganda; NOT confirmed: Burundi


Male © Adolfo Cordero


Appendages (dorsal view)

Abdominal segment 2 (ventral view)

Frons (dorsal view)

Leg

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):


Male; Gabon, Haut-Ogoué, "chemin" en forêt © Mézière, Nicolas, ANDRE GUENTHER,JENS KIPPING, RAIK MORITZ, HANNES KRAHNSTOEVER


Male; Sierra Leone, Eastern Province, Gola Forest © Dijkstra, K.-D.B. & A. Dayeker


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


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


Male; Democratic Republic of Congo, Province Equateur, Lower Itimbiri


Female; Democratic Republic of Congo, Province Orientale, Kisangani © Dijkstra, K.-D.B.

References

  • Karsch, F. (1891). Kritik des Systems der Aeschniden. Entomologische Nachrichten, 17, 273-290.
  • Sjöstedt, Y. (1900). Odonaten aus Kamerun, West -Afrika.Beltrage Zur Kenntnis der insektenfauna von Kamerun.Binhang Kongliga Svenka VetenskapsAkademiens Handlingar, 25, 1-62.
  • Pinhey, E.C.G. (1962). Some records of Odonata collected in tropical Africa. Journal Entomological Society Southern Africa, 25, 20-50. [PDF file]
  • Martin, R. (1907). Odonates de la Guinée espagnole. Memorias Sociedad espanola Historia natural, 1, 421-432. [PDF file]
  • Schouteden, H. (1934). Annales Musee Congo belge Zoologie 3 Section 2, 3, 1-84. [PDF file]
  • Pinhey, E.C.G. (1966). Notes on African Odonata, particularly type material. Revue Zoologie Botanique Africaines, 73, 283-308. [PDF file]
  • Pinhey, E.C.G. (1971). Odonata collected in Republique Centre-Africaine by R. Pujol. Arnoldia, 5, 1-16. [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/ [2017-12-11].