pacificum, Idiastion Ishida [M.] & Amaoka [K.] 1992:357, Figs. 1-2 [Japanese Journal of Ichthyology v. 38 (no. 4); ref. 19515] Kyushu-Palau Ridge, 26°11.5'N, 135°45.4'E to 26°04.7'N, 135°50.4'E, depth 355-375 meters. Holotype (unique): BSKU 31153. •Valid as Idiastion pacificum Ishida & Amaoka 1992 -- (Poss 1999:2306 [ref. 24796], Nakabo 2000:571 [ref. 25086], Mandrytsa 2001:277 [ref. 25636], Nakabo 2002:571 [ref. 26001], McCosker 2008:122 [ref. 29639], Okamoto et al. 2012:2 [ref. 32019], Koeda et al. 2021:5 [ref. 38857]). Current status: Valid as Idiastion pacificum Ishida & Amaoka 1992. Scorpaenidae: Scorpaeninae. Distribution: Northwestern Pacific: Kyushu-Palau Ridge and Kyoto Seamount, central North Pacific: 35°343.00'N, 171°34.50'E - 35°34.90'N, 171°38.60'E. Habitat: marine.