On the Mysid Crustacean Genus Heteromysis (Mysidae: Heteromysinae) of the Tasman Sea, with Notes on the Tribe Heteromysini Author Daneliya, Mikhail E. text Records of the Australian Museum 2021 Rec. Aust. Mus. 2021-05-19 73 1 1 50 http://dx.doi.org/10.3853/j.2201-4349.73.2021.1737 journal article 10.3853/j.2201-4349.73.2021.1737 2201-4349 5412605 1BD21A8F-7A38-4273-ABE1-EC9DAD4CC73E Key to the Tasman Sea subgenera of Heteromysis 1 Uropodal endopod shorter than exopod. Antennular peduncle segment 3 with flagellated distomedial spiniform setae ( Figs 1A,F ; 5A,F ; 9A,F ; 18A ; 23A ). Pereopod 1 ischium with smooth medial margin (not counting setae, spine-setae and slight tubercles) ................................................................................................................................... 2 —— Uropodal endopod as long as or slightly longer than exopod. Antennular peduncle segment 3 with simple, non-flagellated distomedial setae. Pereopod 1 ischium with serrated medial margin ................................................................................ Gnathomysis Bonnier et Perez, 1902 2 Pereopod 1 merus with distomedial triangular process (not known in males of Heteromysis tasmanica ) ( Figs 2E , 7A,B , 10F , 14H ); carpopropodus segment 2 with strong, serrated paradactylary setae ( Figs 2G , 7 A−C, 10F,G, 14H,I). Eyestalk lacking distomedial spine or tubercle ( Figs 1A , 5A , 9A , 13B ) ................................... Heteromysis s. str. —— Pereopod 1 merus without distomedial triangular process; carpopropodus segment 2 without strong, serrated paradactylary setae ( Figs 19G , 24D ). Eyestalk with distomedial spine or rarely tubercle ( Figs 18A , 23A ) ................................................................... Olivemysis Băcescu, 1968