owasianus, Carapus Matsubara [K.] 1953:29, Fig. 1 [Japanese Journal of Ichthyology v. 3 (no. 1); ref. 12702] Off Owasi, Mie Prefecture, Japan, depth 151.5 meters. Holotype (unique): FAKU 18871. If cinereum is treated as valid, then Eurypleuron owasianum is limited to the Southern Hemisphere. •Valid as Carapus owasianus Matsubara 1953 -- (Arnold 1956:278 [ref. 5315], Machida in Masuda et al. 1984:99 [ref. 6441]). •Valid as Echiodon owasianus (Matsubara 1953) -- (Williams 1984:417 [ref. 6813], Shen & Yeh 1987:51 [ref. 6418], Paxton et al. 1989:320 [ref. 12442], Paulin et al. 1989:132 [ref. 24556]). •Valid as Eurypleuron owasianum (Matsubara 1953) -- (Markle & Olney 1990:338 [ref. 18996], Williams & Machida 1992:372 [ref. 18993], Heemstra in Smith & Heemstra 1995:353 [ref. 21953], Markle in Nielsen et al. 1999:18 [ref. 24448], Nielsen 1999:1978 [ref. 24753], Nakabo 2000:446 [ref. 25086], Markle in Randall & Lim 2000:596 [ref. 25122], Nakabo 2002:446 [ref. 26001], Parmentier 2012:2 [ref. 32365], Parmentier 2015:710 [ref. 34258], Sonoyama et al. 2020:31 [ref. 37637], Heemstra 2022:260 [ref. 39704]). Current status: Valid as Eurypleuron owasianum (Matsubara 1953). Carapidae: Carapinae. Distribution: Circumglobal in warm temperate oceans. Habitat: marine.