Key to Meristogenys larvae from Sabah

1. Seven rows of upper labial teeth.......................................................................... 2

- Six rows of upper labial teeth............................................................................ 5

2. Tail glands on both fins, head and body without surface projections................................ M. amoropalamus

- Tail glands absent or limited to ventral fin, head and body with surface projections.................................. 3

3. Lower jaw sheaths divided by a narrow vertical line or a crack........................................ M. maryatiae

- Lower jaw sheath undivided............................................................................. 4

4. Ventral tail glands usually less than six........................................................ M. stenocephalus

- Ventral tail glands usually more than six....................................................... M. stigmachilus ......................................................................................... M. whiteheadi

5. Lower jaw sheath undivided, ventral glands present............................................. M. kinabaluensis

- Lower jaw sheaths divided by a broad space, ventral glands absent.............................................. 6

6. Head and body rectangular, usually seven or eight rows of lower labial teeth.............................. M. dyscritus

- Head and body oval, usually six rows of lower labial teeth........................................ M. orphnocnemis