Wheeler, 1970
Short Description:
Paivella naporai is an aetideid calanoid copepod known after female (1.27 mm in length) from South Atlantic, in abyssopelagic.
Taxonomic Description:
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.
Male unknown.
Vertical distribution:
The species was found in haul between 2755 and 4000 m (Wheeler, 1970).
Geographical distribution:
The species was found from type locality only, from the South Atlantic (Wheeler, 1970).
Type locality: 15°00'S 30°00'W.
Material examined:
The species absent in the collections of Zoological Institute, Russian Academy of Sciences, St. Petersburg.