Acutiserolis poorei sp. nov., is described from the Amundsen and Bellingshausen Seas, Southern Ocean. Comparison
with the type material of the most similar species, Acutiserolis spinosa (Kussakin, 1967) revealed that A. poorei may be
distinguished from A. spinosa by broader eyes, less acute and slightly shorter coxal plates and the small tubercles that are
irregularly scattered on the dorsal surface. Additionally, no suture divides the fi fth coxal plate and the head has a prominent
mediocaudal spine reaching to the middle of the third pereonite; the appendix masculina is considerably shorter than that
of A. spinosa, while the pleotelson of A. poorei is covered with some small tubercles and the mediocaudal tip is slightly
more prominent than that of A. spinosa.