A new species of the freshwater crab genus Potamonemus Cumberlidge & Clark, 1992 (Crustacea, Potamonautidae) endemic to the forested highlands of southwestern Cameroon, Central Africa

Frontal view of the right and left chelae of adult males of species of Potamonemus from southwestern Cameroon a, b largest adult male (CW 29 mm) of P. mambilorum from Mount Nlonako (ZMB Crust. 32428) c, d adult male (CW 28 mm) of P. mambilorum from small stream on Mount Manengouba (ZMB Crust. 30326) e, f largest adult male, holotype (CW 31 mm) of P. man sp. nov. from Bakossi National Park (ZMB Crust. 30328) g, h adult male, holotype (CW 25 mm) of P. man sp. nov. from Man Lake, Mount Manengouba (ZMB Crust. 30320). Dorsal view of the right cheliped carpus of adult males of species of Potamonemus i, largest adult male (CW 29 mm) of P. mambilorum from Mount Nlonako (ZMB Crust. 32428) j adult male (CW 28 mm) of P. mambilorum from small stream on Mount Manengouba (ZMB Crust. 30326) k adult male (CW 31 mm) of P. man sp. nov. from Bakossi National Park (ZMB Crust. 30328) l adult male, holotype (CW 25 mm) of P. man sp. nov. from Man Lake, Mount Manengouba (ZMB Crust. 30320). Scale bars: 5 mm (a, c, g), 2.5 mm (b, d, f, h), 5 mm (i, j, k, l).