Key to five species of the genus Allokepon (based on female characters):

1. Pleopods and lateral plates with tubercles....................................................................................................2

– Pleopods and lateral plates without tubercles...............................................................................................3

2. Uropods much longer than lateral plates of pleomere 5 ......................... Allokepon tiariniae (Shiino, 1937)

– Uropods similar to lateral plates of pleomere 5 ..................................... Allokepon monodi (Bourdon, 1967)

3. Uropods much longer than lateral plates of pleomere 5 ................................... Allokepon longicauda n. sp.

– Uropods short, not longer than lateral plates of pleomere 5.........................................................................4

4. Head bilobate ...................................................................... Allokepon hendersoni (Giard & Bonnier, 1887)

– Head oval .............................................................................................. Allokepon sinensis (Danforth, 1971)