Bradford, 1969a
Short description:
Aetideopsis tumorosa is an aetideid calanoid copepod known after both sexes (female 2.50-2.77 mm and male 2.40-2.60 mm in total length). The species is mostly mesopelagic, occurring in the southern part of the Pacific ocean.
Taxonomic description:
Female. Total length 2.50-2.77 mm. Cephalothorax about 3-3.5 times longer than abdomen. Rostrum with spaced in their base, divergent rami. Points of Th5 posterior corners reaching the last third of genital segment, slightly divergent (dorsal view). Genital segment with lateral swellings in its anterior part (dorsal view). A1 reaching Abd2. Re2 A2 with medial seta. Ri2 Md with 9 seta, Projection at Mxp protopodite absent. Ri P1 lacking external lobe, external spine at Re1 P1 exceeding the base of next spine, second spine at Re2 P1 exceeding the middle of following joint. Ri P2 with nearly completely fused joints. P3-P4 rami 3-jointed.
Male. (Description after Bradford (1969a) with modifications). Total length 2.40-2.60 mm. Cephalothorax 2.9 times longer than abdomen. Points of Th5 posterior corners reaching posterior border of genital segment (dorsal view). A1 reaching nearly Th2. Oral parts rudimental in comparison with that of female. Lobe at Ri P1 absent. External spines at Re1 and R2 P1 shorter than in female. Segmentation of Ri P2 more clear visible than in female. P3-P4 as that in female, P5 typical of the genus.
Vertical distribution:
Found in total hauls from 200-1500m and in hauls taken from 200-500m (Bradford, 1969a).
Geographical distribution:
The species was found off the New Zealand region (Bradford, 1969a; Markhaseva, 1996) and the southern part of the Pacific Ocean: region of 54°S, 119°W (Park, 1978) and region 53-55°S 129-141°W (Markhaseva, 1996).
Type locality: 42°26'S 173°52'E (Bradford, 1969a).
Material examined:
14 females and 5 males from samples: 347, 385, 388, 426, 433. See examined samples module.