Diastatomma multilineatum Fraser, 1949
Blackwater Hoetail

Type locality: Luigunda [ass. Lingunda], DRC

Diagnosis

Male is similar to widely co-occurring D. selysi by (a) pale stripes on thorax narrow, on black background, with antehumeral and metepisternal stripes complete; (b) all veins including costa dark. However, differs by (1) black on fronto-clypeal suture wide on both sides of suture and broadly fused with black on lower postclypeus; (2) posterior hamule deeply, rather than weakly incised, and its border pointed anteriorly; (3) two dorsal black stripes usually interrupt apical pale ring on S2, but basal pale ring on S3 complete; (4) inner branch of cercus almost perpendicular to cercus axis (rather than slanted backwards), angle between them about 80º (rather than 60º), branch more parallel-sided and square-cut at end. [Adapted from Dijkstra & Clausnitzer 2014]

Habitat description

Streams shaded by forest. Mostly with a sandy but often also gravelly bottom, blackwater and probably coarse detritus. From 300 to 600 m above sea level, but mostly around 400.

Distribution

confirmed: Congo-Brazzaville; Democratic Republic of the Congo; Gabon


Male © Jens Kipping


Appendages (dorsal view)

Posterior hamule (lateral view)

Tubercle (frontal view)

Tubercle (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):

; Gabon, Haut-Ogoué, Africa n°1 © Mézière, Nicolas


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

References

  • Fraser, F.C. (1949). Gomphidae from the Belgian Congo (order Odonata). Revue Zoologie Botanique Africaines, 42, 101-138. [PDF file]
  • Pinhey, E.C.G. (1962). Some records of Odonata collected in tropical Africa. Journal Entomological Society Southern Africa, 25, 20-50. [PDF file]

Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2017-09-23].