Acisoma trifidum Kirby, 1889
Pied Pintail


  • scientific: A. trifida
  • vernacular: Ivory Pintail

Type locality: Congo, no locality data available.


Male is set apart from other Acisoma species by (1) ranging from N Zambia and Uganda to W Africa; (2) labrum largely black rather than pale; (3) S3-10 gradually narrowing rather than strongly swollen; (4) pale markings on Abd solid and clean-cut, extend to S6, dorsal carina S4-5 (largely) unmarked with black. [Adapted from Dijkstra & Clausnitzer 2014]

Habitat description

Standing and probably often temporary waters in open areas in forest. Usually with emergent and often aquatic vegetation, and a soft (like muddy) bottom. From 0 to 1700 m above sea level, but mostly below 1200.


confirmed: Angola; Benin; Côte d'Ivoire; Cameroon; Central African Republic; Congo-Brazzaville; Democratic Republic of the Congo; Equatorial Guinea; Gabon; Gambia; Ghana; Guinee-Bissau; Liberia; Nigeria; Republic of Guinea; Rwanda; Sierra Leone; Togo; Uganda; Zambia; NOT confirmed: Burundi; Senegal; Tanzania

Male © Jens Kipping

Abdomen (dorsal view)

Abdominal segment 2 (lateral view)

Abdomen (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):

Adult, male; Angola, Uige Province, new campus site and environs © Clausnitzer, V. & Dijkstra, K.-D.B.

Male; Liberia, Nimba County, Mt Tokadeh © Dijkstra, K.-D.B.

Male; Democratic Republic of Congo, Province Orientale, © 67292


  • Kirby, W.F. (1889.) A revision of the subfamily Libellulinae, with descriptions of new genera and species. Transactions Zoological Society London, 12, 249-348.
  • 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]
  • Pinhey, E.C.G. (1961). Dragonflies (Odonata) of Central Africa. Occasional Papers Rhodes-Livingstone Museum, 14, 1-97. [PDF file]
  • Ris, F. (1931). Odonata aus Süd-Angola. Revue Suisse Zoologie, 38, 97-112. [PDF file]
  • Schouteden, H. (1934). Annales Musee Congo belge Zoologie 3 Section 2, 3, 1-84. [PDF file]
  • Pinhey, E.C.G. (1971). Odonata collected in Republique Centre-Africaine by R. Pujol. Arnoldia, 5, 1-16. [PDF file]
  • Schmidt, E. (1951). Libellen aus Portugiesisch Guinea, mit Bemerkungen über andere aethiopische Odonaten. Arquivos Museu Bocage, 20, 125-200. [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. [2024-05-26].