Markhaseva, 1986b
Short Description:
Batheuchaeta tuberculata is an aetideid calanoid copepod known after female (4.30 mm in total length) found in total haul from 7000 m in the Kurile-Kamchatka Trench area.
Taxonomic description:
Female. Total length 4.30 mm. Body elongate-oval. Rostrum absent. Posterior Th5 corners asymmetrical, right more prominent than left. Abdomen 4.4 times shorter than cephalothorax. Genital segment asymmetrical, with protuberance on the right and bifid projection in the middle of segment on the left, and also with small semicircle projection near border with Abd2 (dorsally) on the left. Genital field symmetrical with "spectacle-like" structure. A1 24-segmented, equal to body in length. Re A2 1.5 times longer than Ri, seta on coxopodite is not visible, may be broken, as well as second seta at Ri1, all other features typical of the genus. Ri Mx1 with 13-14 setae. Setation of Mx2, Md and Mxp and segmentation of P2-P4 typical of the genus. Spinules at Ri P1 external lobe arranged in rows along distal edge. Row of spinules at P2 is only near the base of external spine. Re P3-P4 broken, Ri 3-segmented with spinules on posterior surfaces Ri2-Ri3.
Male unknown.
Vertical distribution:
The species was found in total haul from 7000 m (Markhaseva, 1986b).
Geographical distribution:
Pacific Ocean: the Kurile-Kamchatka Trench area (Markhaseva, 1986b).
Type locality: 45°43'N 153°45'E (Markhaseva, 1986b).
Material examined:
1 female from sample 128. See examined samples module.
Type Material: Holotype, female, total length 4.30 mm, N 1/65570, R/V "Vitjaz", 39th cruise, 45°43'N 153°45'E, Sta. 5617, sample 118, 4-5 August 1966, stratum 7040-? m, closing ring-trawl. Type is kept in the Zoological Institute, Russian Academy of Sciences, St. Petersburg.