Paivella naporai is an aetideid calanoid copepod known after female (1.27 mm in length) from South Atlantic, in abyssopelagic.
Female. (Description after Wheeler (1970) with modifications). Total length 1.27 mm. Cephalon and Th1, Th4-Th5 fused. Rostrum present, two-pointed. Th5 posterior corners triangular and pointed covering about one third of length of genital segment. Genital segment produced into 2 distinct protuberances extending ventrally and laterally, visible in dorsal view. Caudal rami twice as long as wide. A1 22-segmented, reaching the midlength of Abd. A2 coxopodite with 1, basipodite with 2 setae, Re1 A2 with 1, Re2 A2 with 2 setae, Ri1 A2 with 1 seta, Ri2 A2 with 14 setae (7 on external and 7 on internal lobes). Md palp base with 2 setae, Ri1 Md with 2, Ri2 Md with 9 terminal and 1 posterior seta. Mx1 gnathobase with 9 terminal and 4 setae on posterior surface, second internal lobe with 4, third with 3 setae, protopodite near the Ri base with 5 setae, Ri with 11 setae, Re with 11, external lobe with 7 setae. Mx2 with setae thickened into spine on fourth and fifth endites. Mxp protopodite with groups of 2, 2 and 2 setae. Re1 P1 without external spine, Ri P1 with well developed external lobe, covered with teeth apically. Ri P2 one-segmented. P4 coxopodite with 2 transverse rows of spines on the posterior surface.
The species was found in haul between 2755 and 4000 m (Wheeler, 1970).
The species was found from type locality only, from the South Atlantic (Wheeler, 1970).
Type locality: 15°00'S 30°00'W.
The species absent in the collections of Zoological Institute, Russian Academy of Sciences, St. Petersburg.