hypargyreus, Monacanthus Cope [E. D.] 1871:477 [Transactions of the American Philosophical Society (New Series) v. 14 (pt 3) (art. 5); ref. 920] "Supposed to be from Australia." Syntypes: ANSP 786-787 (2). Type catalog: Böhlke 1984:26 [ref. 13621]. •Valid as Thamnaconus hypargyreus (Cope 1871) -- (Hutchins 1977:57 [ref. 2283], Shimizu & Hatooka 1997:6 [ref. 24377], Matsuura & Tyler 1997:193 [ref. 23219], Hutchins in Randall & Lim 2000:648 [ref. 25122], Nakabo 2000:1408 [ref. 25182], Hutchins 2001:48 [ref. 25847], Hutchins 2001:3947 [ref. 26316], Nakabo 2002:1408 [ref. 26193], Shinohara et al. 2005:444 [ref. 28370], Allen et al. 2006:1899 [ref. 29098], Larson et al. 2013:234 [ref. 32988], Yoshida et al. 2013:229 [ref. 34464], Shinohara et al. 2014:278 [ref. 33330], Matsuura 2014:13 [ref. 33576], Stewart & Roberts 2015:1723 [ref. 34322], Motomura et al. 2017:234 [ref. 35490], Kim et al. 2020:199 [ref. 39118], Sonoyama et al. 2020:129 [ref. 37637]). Current status: Valid as Thamnaconus hypargyreus (Cope 1871). Monacanthidae. Distribution: Western Pacific and southeastern Indian Ocean. Habitat: marine.