Key to the species of Hiroshiinoueana based on male genitalia

1. Valvae with bristle clusters of different length and thickness on left and right sacculi............................... 2

- Valvae with bristle clusters the same size on right and left sacculi.............................................. 3

2. Valvae with right sacculus forming a long process bearing a long bristle cluster, left sacculus shorter and bearing a short bristle cluster; cucullus triangular..................................................................... H. stellifera

- Valvae with right sacculus shorter and bearing a short bristle cluster, left sacculus forming a long process and bearing a long bristle cluster; cucullus rounded............................................................... H. inequivalva

3. Gnathos with two dorsally curved areas; valva not folded lengthwise, sacculus shorter than cucullus.... H. gangweonensis

- Gnathos with lateral bands straight; sacculus folded beneath and longer than cucullus.................. H. wuzhishanica