BOPYROIDES STIMPSON, 1864

1a. Pleon of five pleomeres (last two pleomeres fused).. B. shiinoi Rybakov and Avdeev, 1991

1b. Pleon of six pleomeres............... 2

2a. Sixth pleomere extended and produced into two divergent rami.. B. cluthae (Scott, 1902)

2b. Sixth pleomere not extended, terminally smooth, round.. B. hippolytes (Kröyer, 1838)