Potamocypris arcuata is a species of ostracod crustacean in the family Cyprididae, subfamily Cypridopsinae.

The valve surface is covered with tiny pits and dense setae.

The second antennae carry swimming setae that extend beyond the tips of the terminal claws.

[3] Bisexual populations (with males and females) are reported from North Africa only.

All other known populations consist of females only and are therefore inferred to reproduce by parthenogenesis.