Key to species of the genus Porirualia Huys & Mu, 2021

1. P3 and P4 exp-3 with two inner setae.............................. Porirualia pyriformis (Song, Kim & Chang, 2003)

- P3 and P4 exp-3 with three inner setae.................................................................... 2

2. P 5 female exopod elongated, ratio of length to maximum width 3.83...................... Porirualia ngankeeae sp. nov.

- P 5 female exopod not elongated, ratio of length to maximum width 2.2.................................................................................................... Porirualia megarostrum (Wells, Hicks & Coull, 1982)