Cirrhinus lobatus (Smith, 1945) Gymnostomus lobatus (Smith, 1945) Henicorhynchus lobatus Smith, 1945 Tylognathus entmema Fowler, 1934 Henicorhynchus entmema, the notched mud carp[2] or lesser silver mud carp,[1] is a species of freshwater fish in the family Cyprinidae.

It is common in the Mekong and also occurs in the Mae Klong and Chao Phraya basins as well as in the associated lowland areas.

[1] Henicorhynchus entmema occurs in rapids and in slow-flowing water, also in small streams.

It is the numerically most abundant fish species in the seasonal migrations occurring in the mainstream Mekong below the Khone Phapheng Falls.

This migration is potentially threatened by the proposed hydropower developments.