On the basis of material from the Moyen Atlas it is shown that C. castellani is a good species. It often co-occurs there with C. mercuriale hermeticum (Selys, 1872). The 2 taxa are described and figured.

Odonatologica

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Societas Internationalis Odonatologica

B. Ben Azzouz, R. Guemmouh, & P. Aguesse. (1989). A propos des Coenagrion du groupe mercuriale (Charpentier, 1840) et de la presence de C. castellani Roberts, 1948 au Maroc (Zygoptera: Coenagrionidae). Odonatologica, 18(3), 279–283.