Allocnemis subnodalis (Selys, 1886)
- scientific: Isomecocnemis subnodalis
- vernacular: Blue Y.
Type locality: Old Calabar, Nigeria
No diagnosis of this species is presently available, but the male is unmistakable in the Upper Guinea by its all-blue coloration.
Mostly headwater streams, but also seeps and springs, shaded by forest. Usually with coarse detritus and probably often a sandy and/or soft (like muddy) bottom. From 0 to 1000 m above sea level, but mostly below 800.
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.
- de Sélys-Longchamps, E. (1886). Révision du Synopsis des Agrionines. 1e partie (Légions Pseudostigma, Podagrion, Platycnemis et Protoneura). Memoires couronnes Academie royale Belgique, 38, 1-233.
Citation: Dijkstra, K.-D.B (editor). African Dragonflies and Damselflies Online. http://addo.adu.org.za/ [2019-03-20].