Retropluma Gill, 1894 (Crustacea, Decapoda) from the Eocene of the eastern Pyrenees (Spain, France)

A new species of Retropluma Gill, 1894, R. gallica, is described from lower Eocene deposits of Fontcouverte (Aude, southern France), and compared to R. eocenica Via, 1959, of which a more detailed description is given based on numerous new specimens. The new material allows us to assess intraspecific variation. The subspecies R. eocenica folgarolensis Via, 1980, falls within the range of variation of R. eocenica. The preferred habitats of the genus through time are discussed, showing soft-bottom shelf environments to rank first.