Species that contain: Arctoscopus and japonicus [ 2 ] records hachirogatensis, Arctoscopus japonicus Hatai [K.] 1955:29, Figs. 7-8 [Records of Oceanographic Works in Japan v. 2 (no. 3); ref. 12274] Hachiro-gata, Akita Prefecture, Japan. Holotype (unique): Dept. Geol. Tohuku Univ., Sendai, Reg. No. P-116. Subspecies hachirogatensis is based on an otolith of a recent species. •Synonym of Arctoscopus japonicus (Steindachner 1881) -- (Mecklenburg 2003:1 [ref. 27305], Dyldin & Orlov 2017:186 [ref. 35257]). Current status: Synonym of Arctoscopus japonicus (Steindachner 1881). Trichodontidae. Habitat: marine.
japonicus, Trichodon Steindachner [F.] 1881:182 [4], Pl. 4 (figs. 1-1a) [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 83 (1. Abth.); ref. 4231] Gulf of Strietok, Sea of Japan; and Sitka, Alaska, U.S.A. [last locality probably in error]. Syntypes: NMW 76838-39 (1, 1), 75553 (2). On p. 4 of separate. See Mecklenburg et al. 2002:792, 794 [ref. 25968] and Mecklenburg 2003:2 [ref. 27305] for comments on distribution. •Valid as Arctoscopus japonicus (Steindachner 1881) -- (Amaoka in Masuda et al. 1984:221 [ref. 6441], Sokolovskaya et al. 1998:13 [ref. 24670], Nakabo 2000:1058 [ref. 25182], Sheiko & Fedorov 2000:39 [ref. 25650], Mecklenburg et al. 2002:794 [ref. 25968], Nakabo 2002:1058 [ref. 26193], Choi et al. 2003:383, 646 [ref. 26218], Chereshnev & Nazarkin 2002:711 [ref. 26470], Mecklenburg 2003:1 [ref. 27305], Fedorov et al. 2003:129 [ref. 27579], Parin 2003:S19 [ref. 28536], Nelson et al. 2004:160 [ref. 27807], Love et al. 2005:151 [ref. 37547], Shinohara et al. 2011:54 [ref. 31715], Page et al. 2013:165 [ref. 32708], Shinohara et al. 2014:271 [ref. 33330], Parin et al. 2014:463 [ref. 33547], Tohkairin et al. 2015:6 [ref. 35331], Dyldin & Orlov 2017:186 [ref. 35257], Kim et al. 2020:159 [ref. 39118], Sonoyama et al. 2020:88 [ref. 37637], Dyldin & Orlov 2021:855 [ref. 38925], Dyldin et al. 2021:56 [ref. 38804], Love et al. 2021:192 [ref. 39279], Panchenko & Antonenko 2021:460 [ref. 40109], Page et al. 2023:216 [ref. 40505]). Current status: Valid as Arctoscopus japonicus (Steindachner 1881). Trichodontidae. Distribution: Northern and northwestern Pacific: Aleutian Islands to Bering Sea, Okhotsk Sea and Sea of Japan (Korea, Japan, Russia). Habitat: marine.
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