Hydrovatus subrotundatus, is a species of predaceous diving beetle found in India, Bangladesh, Myanmar, Nepal, Sri Lanka, China, Indonesia, Laos, Philippines, Singapore, Thailand, Vietnam and Australian region.

[1][2][3][4] Body broad and oval.

The lateral margin between the elytra and epipleura is clearly visible from above.

Clypeus with a distinct front margin.

[5] This Dytiscidae-related article is a stub.