Mekhongthelphusa is a genus of freshwater crabs in the family Gecarcinucidae, found in South-East Asia.
Species Mekhongthelphusa brandti (Bott, 1968): Thailand, Vietnam Mekhongthelphusa kengsaphu Naiyanetr & Ng, 1995 Mekhongthelphusa neisi (Rathbun, 1902): Vietnam Mekhongthelphusa tetragona (Rathbun, 1902)
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