Larvae and exuviae of three semivoltine Anisoptera were collected during three years (1988-1990) from a permanent stream in the Sierra Morena (southern Spain). It seems that each species exhibits a different life-history pattern. Cordulegaster boltoni is a typical spring species and Boyeria irene is a typical summer species in the sense defined by Corbet. The life-history pattern of Onychogomphus uncatus is less clear.

Advances in odonatology

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Societas Internationalis Odonatologica

M. Ferreras-Romero. (1994). Life history of the species that make up the odonate association characteristic of a permanent stream in the Western Mediterranean basin: preliminary results. Advances in odonatology, 6(1), 45–48.