Gynacantha (A) cylindrata Karsch, 1891
Greater Girdled Duskhawker

Type locality: Chinchoxo, Angola [Cabinda Enclave]

Diagnosis

Male is similar to G. vesiculata by (a) rim of metastigma black, contrasting with colour of thorax; (f) anal triangle of 3-6 cells; (d) 2-3 cell-rows between R2 and R3 proximal to Pt; (e) brace veins absent; (h) cerci widened, and at most thickened somewhat near base and sharply cut-off at end, inner border bisinuous, concave roughly 2/3 from base; (b) wings may be tinted, but without distinct subcostal rays; (c) mainly 4-5 rows in fork of IR3; (g) S3 cylindrical, of almost uniform width throughout. However, differs by (1) larger average size, Hw 47-51 mm; (2) cerci with deep subapical excavation with tuft of hair at its basal side, rather than with evenly spaced hairs along entire length. [Adapted from Dijkstra & Clausnitzer 2014]

Habitat description

Standing and mostly temporary waters shaded by (gallery) forest. Usually with coarse detritus and mostly a soft (like muddy) bottom. From 0 to 1400 m above sea level, but mostly below 800, although possibly up to 1800.

Distribution

confirmed: Benin; Côte d'Ivoire; Cameroon; Congo-Brazzaville; Democratic Republic of the Congo; Equatorial Guinea; Gabon; Ghana; Liberia; Nigeria; Sierra Leone; Tanzania; Uganda; NOT confirmed: Republic of Guinea


Female © KD Dijkstra


Appendages (dorsal view)

Abdominal segment 2 (ventral 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):


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


Male; Democratic Republic of Congo, Province Orientale, Lower Aruwimi © Dijkstra, K.-D.B.


Female; Liberia, Grand Gedeh County, Putu Iron Ore Mining concession © Dijkstra, K.-D.B. & A. Dayeker


Female; Cameroon, Centre Province, Yaounde © Dijkstra, K.-D.B., J. Kipping & K. Schuette

References

  • Karsch, F. (1891). Kritik des Systems der Aeschniden. Entomologische Nachrichten, 17, 273-290.
  • Pinhey, E.C.G. (1962). Some records of Odonata collected in tropical Africa. Journal Entomological Society Southern Africa, 25, 20-50. [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/ [2017-10-21].