I address questions in evolution: fossils and their interest to solve phylogeny deep nodes ; evolution of complex structures/ key innovations ; prospects in bone paleohistology. The phylogeny and distribution of both extant and fossil fish allow me to propose a history for ancient hydrographical connections.

I describe the ichthyofaunas yielded by various Tertiary sites from Afro-Arabia and the assemblages allow me to characterise aquatic paleoenvironments.

I cross information on the fossil fish ecology with the chemical signals they recorded (δ180) to catch the water cycle at the scale of the basin. I do the same with sclerochronological tools (growth of hard parts) to evaluate seasonal variation intensity. The latter project implies an experimentation developed in collaboration with Géraldine GARCIA.