Taxonomic revision of the endemic Cameroonian freshwater crab genus Louisea Cumberlidge, 1994 (Crustacea, Decapoda, Brachyura, Potamonautidae), with descriptions of two new species from Nkongsamba and Yabassi

Four species of Louisea endemic to southwestern Cameroon, right G1 ventral view (a–c), left G1 ventral view (d). a Second largest adult male (CW 16.1 mm) of L. edeaensis from Lake Ossa wetland complex (ZMB Crust. 30335) b largest adult male (CW 16.2 mm) of L. balssi from Man’s Crater Lake Manengouba (ZMB Crust. 30319) (‘Mvogo Ndongo et al. 2018: fig. 5b’) c adult male, holotype (CW 18.1 mm) of L. yabassi from Yabassi (ZMB Crust. 21575) d largest adult male, holotype (CW 20.0 mm) of L. nkongsamba sp. nov. from Mt. Nlonako (ZMB Crust. 31618). Scale bars: 2 mm (a, c, d), 1 mm (b).