Pyrenicola (Crustacea: Decapoda: Brachyura), new genus for Litoricola macrodactyla (Van Straelen, 1924) and Litoricola macrodactyla pyrenaica (Artal and Vía, 1989), and remarks on Coeloma (Milne-Edwards, 1865).

A new genus, Pyrenicola, is proposed to accommodate Xanthilites macrodactylus Van Straelen, 1924 from the Thanetian of Haute Garonne (France), and X. macrodactylus pyrenaicus Artal and Vía, 1989 from the Ypresian of Aragon (Spain), as well as clarify their relationships with the morphologically close Litoricola Woodward, 1873, where both are currently placed, and with Coeloma A. Milne-Edwards, 1865. As a result, Litoricola is herein revalidated as an available genus, different from Coeloma, of which it has frequently been considered either a subgenus or a synonym. Also, the subspecies Xanthilites macrodactylus pyrenaicus is elevated to full species rank as Pyrenicola pyrenaica n. comb. The familial placement of Pyrenicola n. gen., Litoricola and particularly of Coeloma, currently placed within Polybiinae Paulson, 1875 (Portunoidea Rafinesque, 1815) is revised. Consequently, a new placement of the three genera within Geryonidae Colosi, 1923, the most basal portunoid crabs, is herein proposed.