Pseudagrion (B) isidromorai Compte Sart, 1967
Large Blue Sprite

Type locality: Mongomo, Equatorial Guinea


Male is similar to P. glaucoideum by (a) ranging from W Uganda and N Zambia to W Africa; (b) size, Hw 19-23 mm; (c) face green or blue, sometimes yellowish; (d) dorsum of S2 with double-pronged marking, like U or Y, or largely black, usually with blue centre; (e) S8-9 seldom with narrowly black apical border, often all blue; (f) apex of penis weakly to strongly concave; (g) upper branch of cerci hooked, but inner border of lower branch smooth- lower branch of cerci long, finger-like; (h) paraprocts never with dorsal knob (lateral view). However, differs by (1) humeral sutures and vertex often (but not always) extensively black, rather than having fragmented black markings; (2) apex of penis weakly concave, squarish, rather than having long apical lobes with deep notch; (3) lower border of cerci relatively round and bulging in lateral view, rather than being more straight. [Adapted from Dijkstra & Clausnitzer 2014; this diagnosis not yet verified by author]

Habitat description

Streams, but possibly also rivers, in open areas in forest. Probably especially calmer sections (like pools) with emergent and aquatic vegetation, and a soft (like muddy) bottom. From 0 to 1000 m above sea level, but mostly below 800.


confirmed: Angola; Cameroon; Congo-Brazzaville; Democratic Republic of the Congo; Equatorial Guinea; Gabon; Ghana; Liberia; Nigeria; Sierra Leone; Uganda; NOT confirmed: Central African Republic

Male © Jens Kipping

Appendages (dorsal view)

Appendages (lateral view)

Penis (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):

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

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

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.

Male; Liberia, Nimba County, © Dijkstra, K.-D.B. & M. Darpay

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


  • Compte Sart, A. (1967). Boletin Real Sociedad Espanol Historia Natural, 65, 5-15. [PDF file]
  • Pinhey, E.C.G. (1971). Notes on the genus Pseudagrion Selys (Odonata: Coenagrionidae). Arnoldia, 5, 1-4. [PDF file]

Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. [2024-07-21].