New Benthopelagic Calanoids (Copepoda: Clausocalanoidea) of the deep Japan Sea

Two new species of benthopelagic calanoid copepod Bradfordian genera Pseudophaenna japonica sp. nov. and Xantharus dubius are described from collections the Russian-German deep-sea expedition (SoJaBio) to Sea Japan onboard R/V Akademik Lavrentyev, 51st cruise taken close sea bed. The rare Sars, 1902 Andronov, 1981 a aetideid Bradyidius rakuma (Zvereva, 1977) recorded for first time Sea; male B. is time. second genus distinguished by biramous rostrum, antennule ancestral segment XXII without seta, details oral parts setation in females P5 structure dimorphic males. males congeners segments XXIII not comparatively small relative XXI large robust uniramous P5. In SoJaBio 2010 near-bottom benthopelgic fauna Calanoida have been represented these only they all belong superfamily Clausocalanoidea.