Key for the identification of the first zoea of three Nihonotrypaea species

1. Antennal endopod with two terminal plumose setae....................................... Nihonotrypaea makarovi

- Antennal endopod with one terminal plumose seta........................................................... 2

2. Coxa of the second maxilliped with one plumodenticulate seta............................... Nihonotrypaea japonica

- Coxa of the second maxilliped without plumodenticulate setae................................ Nihonotrypaea petalura