Allocnemis marshalli (Ris, 1921)
- scientific: Chlorocnemis marshalli
- vernacular: Blue-shouldered Y.
Type locality: Mazoe, Zimbabwe
Male is similar to A. superba by (a) head black posterior to antennae; (b) labrum all blue; (c) dorsum of middle lobe of prothorax largely black; (d) dorsum of S4-5 largely or entirely black; (e) S9-10 marked with blue; (f) appendages all black; (g) cerci (slightly) shorter than paraprocts. However, differs by (1) ranging from Katanga and N Malawi to Mozambique; (2) blue on frons often does not extend beyond bases of antennae; (3) middle lobe of prothorax with dorsal blue spots, rather than dorsally black; (4) dorsum of S8 blue rather than having only a small blue dot and S3-7 with blue basal spots on dorsum, rather than dorsally all black. [Adapted from Dijkstra & Clausnitzer 2014]
Mostly headwater streams, but also larger streams, shaded by (possibly gallery) forest. Probably often with coarse detritus. From 300 to 2100 m above sea level, but mostly between 900 and 1700, although possibly down to 100.
Body (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.
- Ris, F. (1921). The Odonata or Dragonflies of South Africa. Annals South African Museum, XVIII, 245-452. [PDF file]
- Fraser, F.C. (1928). Odonata of the African continent. Transactions Entomological Society London, 76, 123-138. [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. (1966). Check-list of dragonflies (Odonata) from Malawi, with description of a new Teinobasis Kirby. Arnoldia, 2, 1-24. [PDF file]
Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2019-08-17].