Can be distinguished from O. atlantica by smaller size, structure of the rostrum and significantly shorter caudal setae.
Cosmopolite, but cold Atlantic waters are preferable locations
Oceanic, epi- to bathypelagic species
Female:
Rostrum is directed down, is only visible from lateral view. Caudal setae are never longer than the abdomen. Eggs inside egg-sac are usually placed in 1 row. Md endopodite with a small seta and 3 setae subequal in length. 2nd endopodal segment of Mx1 present and armed with 1 seta; 1st lobe represented by 1 seta
Male:
Rostrum is absent. Both A1 are geniculate. The caudal setae are significantly shorter than in female.
