Trithemis aconita Lieftinck, 1969
Halfshade Dropwing

Type locality: Kisamamba, DRC

Diagnosis

Male is similar to T. congolica by (a) Hw base with small brown patch, normally excluding triangle but extending onto anal field; (b) apex of anterior lamina pale, swollen and turned forward, appearing like hood, bare; (c) hamule with long rather straight hook with abruptly curved point; (d) genital lobe directed away from hamule. However, differs by (1) being widespread outside Congo Basin; (2) smaller size, Hw 27-31 mm; (3) 9½-12½ Ax in Fw, rarely up to 14½; (4) patch at Hw base small, reduced in subcostal space and most prominent in cubital space, at most extends just beyond Cux. [Adapted from Dijkstra & Clausnitzer 2014]

Habitat description

Standing waters, rivers and streams shaded by gallery forest, but also in open areas in forest. Especially pools in stream beds, usually with coarse detritus, often a soft (like muddy) bottom and/or probably emergent vegetation. From 0 to 1700 m above sea level, but mostly below 1300.

Distribution

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


Male © Jens Kipping


Abdominal segment 2 (lateral view)

Wings

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


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


Male; Gabon, Haut-Ogooué, Moupia © Dijkstra, K.-D.B., Nicolas Mézière & Cédric Vanappelghem


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


Male; Liberia, Nimba County, Yekepa-Gbeleyee Road © Dijkstra, K.-D.B.


Male; Liberia, Nimba County, Yekepa-Gbeleyee Road © Dijkstra, K.-D.B.


Male; Liberia, Nimba County, Yekepa-Gbeleyee Road © Dijkstra, K.-D.B.


Female; Democratic Republic of Congo, Katanga, © Dijkstra, K.-D.B.


Female; Democratic Republic of Congo, Katanga, © Dijkstra, K.-D.B.


Female; Democratic Republic of Congo, Katanga, © Dijkstra, K.-D.B.


Adult, male; Angola, Cuanza Norte Province, Ndalatando © Dijkstra, K.-D.B.


Adult, male; Angola, Uige Province, Uige-Quitexe road © Dijkstra, K.-D.B.


Adult, female; Zimbabwe, Manicaland, below Vumba Mts, Burma Valley © Dijkstra, K.-D.B.

References

  • 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 of Fernando Po Island and of neighbouring Cameroons Territory. Journal Entomological Society Southern Africa, 34, 215-229. [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/ [2018-09-26].