Passionate about nature, Petter became a
veterinarian while also completing his training as a naturalist at university. For a long time, he had been frequently visiting the
Muséum national d'histoire naturelle, particularly its laboratory for
Mammals and
Birds. In 1949, he was appointed as an assistant to manage the
mammalogy collections. Throughout his career at the museum, Petter dedicated himself to enriching the mammal collection and disseminating knowledge about nature, all while directing the journal
Mammalia. Through this, he gave a decisive impetus to the mammal collection, which grew by over 30,000 specimens in 40 years. Appointed as deputy director in 1961, he assembled a team of mammalogists with whom he studied the fauna of
Madagascar and
Central African Republic, then those of
Brazil and
French Guiana. Becoming increasingly
systematic, he described new species of
rodents and became the authority on difficult
taxa. Starting in 1965, Petter devoted himself to disseminating scientific knowledge to the general public and focused on renovating the that had been closed for safety reasons. With all his characteristic energy and alongside equally motivated individuals like
Jean Dorst and , he orchestrated the construction of the zoothèque—a vast reserve where most of the museum's collections of
stuffed animals or those preserved through various methods were stored, including many
types. He then led the committee of researchers within the Muséum who reflected on a theme to structure new presentations for the Zoology Gallery; it was thus that the theme of the
Evolution of Species gradually emerged. During his retirement, Petter participated voluntarily in the "Cellule de Préfiguration" to reflect on
museum planning for the renovation of the gallery into the Grande Galerie de l'Évolution. This project became one of the Grands Travaux de l’État starting in 1988. After the opening of the Grande Galerie de l'Évolution in 1994 and until his death, Petter continued to participate in numerous exhibitions as a scientific advisor. An outstanding field expert,
naturalist,
zootechnician and systematician, Petter published over 150 articles and described twenty taxa. An undisputed specialist in the ecology of small
Saharan mammals and the systematics of small
murids in tropical regions, he was part of the team of animal specialists called upon by
François de La Grange for his television show Les Animaux du Monde starting in 1969. == Publications ==