Key to the species of the genus Parapronoe Claus, 1879

1. Telson slightly shorter or longer than U3................................................................... 2

- Telson length about half or less U3........................................................................ 3

2. Pereopod 6; basis with distal ridge/groove locking mechanism on medial surface for opposing pereopod. Epimeral plate 1 with distinct postero-distal excavation. Cuticular markings on body consist of circular pits............. P. c r u s tu l u m Claus, 1879

- Pereopod 6; basis without distinct locking mechanism. Epimeral plate 1 without postero-distal excavation. Cuticular markings on body consist of longitudinal pits or striations....................................... P. campbelli Stebbing, 1888

3. Gnathopod 2; carpal process rounded, barely reaching middle of propodus. Double urosomite; length much less than twice width. Uropod 3; endopoda and exopoda with rounded terminal margin........................... P. parva Claus, 1879

- Gnathopod 2; carpal process pointed, reaching to about ¾ of propodus. Double urosomite; length about twice width. Uropod 3; endopoda and exopoda, lanceolate, pointed........................................... P. elongata Semenova, 1981