THE PYRENEAN EUPROCTUS Claude ROUQUETTE While exploring the Hautes-Pyrenees (France), naturalist Claude ROUQUETTE came across the Pyrenean skink Calotriton asper asper near Pont-de-Moudang, just as he was beginning to develop his research method on the complex processes involved in biological evolution and the transformations of civilization. From question to question, he takes us through the skin respiration, development and metamorphosis of the Euproct, questions its ability to regenerate an organ, and comments on the beginnings of their sociability that he observed in a pond where these mythical salamanders hunt.