mikadoi, Acipenser Hilgendorf [F. M.] 1892:98 [Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin 1892; ref. 14511] Hokaido, Japan. No types known. •Synonym of Acipenser acutirostris Ayres 1854 -- (Okada 1961:282 [ref. 6363]). •Sometimes considered a subspecies of Acipenser medirostris Ayres 1854 -- (Reshetnikov et al. 1997:725 [ref. 24702]). •Synonym of Acipenser medirostris Ayres 1854 -- (Kim 1997:539 [ref. 24032], Bogutskaya et al. 2001:42 [ref. 26178], Bogutskaya & Naseka 2004:24 [ref. 28183]). •Valid as Acipenser mikadoi Hilgendorf 1892 -- (Birstein & Bemis 1997:159 [ref. 29760], Mecklenburg et al. 2002:114 [ref. 25968], Bogutskaya et al. 2008:313 [ref. 30085], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:42 [ref. 33547], Pietsch & Orr 2015:18 [ref. 34694], Dyldin & Orlov 2016:545 [ref. 34656], Dyldin et al. 2020:79, 102 [ref. 37569], Dyldin et al. 2021:16 [ref. 38804], Dyldin & Orlov 2021:60 [ref. 38158], Dyldin et al. 2022:[10] [ref. 39193]). Current status: Valid as Acipenser mikadoi Hilgendorf 1892. Acipenseridae. Distribution: Northwestern Pacific Ocean: southern Okhotsk Sea and Japan to Korea. Habitat: freshwater, brackish, marine.