Membership
He was a Member of Société entomologique de France.Trifurcula chretieni Z. & A. Lastuvka & van Nieukerken, 2013 is "named in honour of Pierre Chrétien (1846–1934), who discovered nepticulid mines on Bupleurum, including those on Bupleurum rigidum, and the first author to describe a number of Mediterranean species that are now placed in Trifurcula (Glaucolepis)." His collection is held by Muséum national d"histoire naturelle in Paris.