Key to the species of the Indo-West Pacific genus Wolffogebia:

1. Rostrum and anterodorsal surface of carapace with well-marked dorsal tubercles.................................. 2

– Rostrum and anterodorsal surface of carapace without dorsal tubercles.......................................... 4

2. Rostrum relatively long, about 1.3 times as long as wide; lower anterior half of propodus of pereopod 1 (cheliped) in males with series of oblique crests on mesial surface.................... W. nhatrangensis Ngoc-Ho, Ngoc-Dung & Phi-Hung, 2001

– Rostrum relatively short, stout, shorted than wide; lower anterior half of propodus of pereopod 1 (cheliped) in males smooth along mesial surface.................................................................................. 3

4. Dorsal surface of rostrum and anterior carapace covered with distinct tufts of bristles; telson with lateral margin slightly convex; carpus without ventrodistal spine and dorsal surface of propodus (chela) of pereopods 1 (chelipeds) serrated in males......................................................................... W. giralia (Poore & Griffin, 1979)

– Dorsal surface of rostrum and anterior carapace covered an even layer of bristles; telson with lateral margin concave; carpus with ventrodistal spine and dorsal surface of propodus (chela) of pereopods 1 (chelipeds) smooth in males.......................................................................................... W. phuketensis K. Sakai, 1982

5. Rostrum relatively short and stout, not more than 1.5 times longer than wide; dorsomesial margin of propodus (chela) of pereopod 1 (chelipeds) in males with 1 strong spine and a well-marked blunt projection......... W. inermis K. Sakai, 1982

– Rostrum relatively long and slender, more than 2 times longer than wide; dorsomesial margin of propodus (chela) of pereopod 1 (chelipeds) in males with distinct spines only, without blunt projections, or smooth............................... 6

6. Merus of pereopod 1 (chelipeds) unarmed in both males and females, without dorsal subdistal spine and spine on proximal ventral margin...................................................... W. annandalei K. Sakai & Lheknim, 2014

– Merus of pereopod 1 (chelipeds) armed with dorsal subdistal spine both in males and females, and at least 1 spine on proximal ventral margin in males................................................................................ 7

7. Dorsal margin of propodus (chela) of pereopods 1 (chelipeds) in males with a series of small longitudinal spines, without large dorsodistal spines; with a small spine at the base of the fixed finger....................... W. heterocheir (Kemp, 1915)

– Dorsal margin of propodus (chela) of pereopods 1 (chelipeds) in males smooth, always with 2 dorsodistal spines; with a large distoventral spine beside the fixed finger........................................ Wolffogebia cangioensis sp. nov.