Key for identification of suctorian ciliates belong to the genus Rhabdophrya

1(4) Macronucleus ellipsoidal.

2(3) Stalk long, provided with physon................................................. Rhabdophrya mumbaiensis n. sp.

3(2) Stalk short, provided with epicone....................................................... Rhabdophrya trimorpha .

4(1) Macronucleus ribbon-like.

5(6) Stalk long, but its length does not exceed half the length of the body, without widening.............. Rhabdophrya truncata .

6(7) Stalk short, with epicone.

7(8) Body converged to the top............................................................ Rhabdophrya populiformis .

8(7) Body not converged to the top.......................................................... Rhabdophrya nymphonis .