The first Carboniferous insects of the paleoforest of the Reyran basin (Esterel Massif, South of France) with palaeoenvironnemental notes.

Here we describe the first discoveries of insects from the Gzhelian of the Reyran Basin (northern part of Esterel, South of France). These are a new mylacrid, <italic>Opsiomylacris</italic> sp. an undetermined genus and species of Phyloblattidae, two other roachoids of uncertain affinities, and a Palaeodictyoptera, all based on forewings. Although these discoveries demonstrate that insects were present in the corresponding paleoforest, they remain less diverse and rarer than the plant remains. The genus <italic>Opsiomylacris</italic> is currently supposed to have lived under xeric environments, possibly corresponding to the more xeric paleobiotas of the margin of the humid valley bottoms. [ABSTRACT FROM AUTHOR]