Mysid Subfamily Boreomysinae (Crustacea: Mysida: Mysidae) in the Southeast Australian Deep-sea Author Daneliya, Mikhail E. text Records of the Australian Museum 2023 Rec. Aust. Mus. 2023-04-26 75 2 87 124 http://dx.doi.org/10.3853/j.2201-4349.75.2023.1845 journal article 10.3853/j.2201-4349.75.2023.1845 2201-4349 Boreomysis (Boreomysis) G. O. Sars, 1869 Type species . Mysis arctica Krøyer, 1861 . Diagnosis . Anterior margin of carapace with distinct rostrum and large ventrolateral projections. Eyes with dorsolaterally flattened, oval, nearly rounded or occasionally reduced cornea. Pereopod propodus 2-segmented (except in B. dubia ). Distribution and habitat . Cosmopolitan. Epi-bathypelagic ( 0–6000 m ). DNA divergence . The mtDNA COI gene divergence between all the studied species of the subgenus Boreomysis sensu stricto was 16–54% of model corrected distance. The divergence between Boreomysis sensu stricto and Petryashovia subgen. nov. was 57–84%. Composition . The subgenus Boreomysis sensu stricto includes 34 species ( Table 1 ). Among them three species have so far been discovered in the Australian deep waters: Boreomysis (Boreomysis) inopinata sp. nov. , Boreomysis (Boreomysis) sibogae , and Boreomysis (Boreomysis) sphaerops Ii, 1964 .