Key to species of the genus Opaepele

1. Rostrum unarmed dorsally ............................................................................................................... Opaepele susannae

– Rostrum armed with dorsal teeth or dorsally notched .................................................................................................. 2

2. Rostrum armed with acute teeth. Ischia and meri of pereopods II–V unarmed ..................................... Opaepele loihi

– Rostrum dorsally notched. Posterior margin of telson concave /straight. Ischia of pereopods III–IV and merus of pereopod III armed with spines ............................................................................................. Opaepele vavilovi sp. nov.