Ceriagrion platystigma Fraser, 1941
Variable Citril

Type locality: Lake Victoria, Uganda

Diagnosis

Male is similar to C. varians by (a) head never blackens, at most S3-7 occasionally (partly) black; (b) humeral and metapleural sutures with dark dots in fossae (may disappear with darkening of body); (c) at least S8-10 always remain red; (d) apex of S10 with fine black denticles, these often indiscernible or merged to thin black ridges; (e) cerci more pointed in lateral view, over half as long as paraprocts. However, differs by (1) labrum and thorax pale brown to deep red rather than both orange; (2) Pt and Abd often red, but both may be (partly) black (especially S5-6, sometimes S4-7); (3) penis with short apex that does not reach bend of its stem (lateral view); (4) cerci separated by space somewhat wider than their width, apical teeth wide apart (dorsal view). [Adapted from Dijkstra & Clausnitzer 2014; this diagnosis not yet verified by author]

Habitat description

Standing and mostly temporary waters shaded by gallery forest, but sometimes shaded by forest, in open areas in forest or open landscapes. Usually with coarse detritus and often emergent vegetation and probably submerged roots. From 0 to 1700 m above sea level.

Distribution

confirmed: Angola; Congo-Brazzaville; Democratic Republic of the Congo; Gabon; Kenya; Nigeria; Rwanda; Uganda; Zambia


Male © Jens Kipping


Appendages (dorsal view)

Appendages (lateral view)

Penis (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):


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


Adult, male; Angola, Uige Province, new campus site and environs © 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.


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


Male; Democratic Republic of Congo, Province Orientale, Old Buta Road © Dijkstra, K.-D.B.


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

References

  • Fraser, F.C. (1941). New African species of Ceriagrion (Odonata). Proceedings Royal Entomological Society London Serie B, 10, 61-66. [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. (1963). Notes on both sexes of some tropical species of Ceriagrion Selys (Odonata). Annals Magazine Natural History, 6, 17-28. [PDF file]
  • Fraser, F.C. (1955). New species and new additions to the Odonata of the Belgian Congo. Revue Zoologie Botanique Africaines, 51, 33-43. [PDF file]
  • Pinhey, E.C.G. (1962). New or little-known dragonflies (Odonata) of Central and Southern Africa. Occasional Papers National Museum Southern Rhodesia, 26, 892-911. [PDF file]
  • Longfield, C. (1959). The Odonata of N. Angola. Part II. Publicacoes culturais Companhia Diamantes Angola, 45, 13-42. [PDF file]
  • Schmidt, E. (1951). Libellen aus Portugiesisch Guinea, mit Bemerkungen über andere aethiopische Odonaten. Arquivos Museu Bocage, 20, 125-200. [PDF file]
  • Aguesse, P. (1966). Contribution à la faune de Congo (Brazzaville) Mission A. Villiers et A. Descarpentries XXI. Odonates. Bulletin de l'Institut fondamental d'Afrique, 28, 783-797. [PDF file]

Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2019-08-24].