atrum, Cyema Günther [A.] 1878:251 [24] [Annals and Magazine of Natural History (Series 5) v. 2 (nos 7/8/9)(art. 2/22/28); ref. 2010] South Pacific, Challenger station 295; Antarctic Ocean, Challenger station 158, depth 1500 and 1800 fathoms. Syntypes: BMNH 1887.12.7.260 (1) Antarctic, BMNH 1887.12.7.261 (S. Pacific). On p. 24 of separate. See also Günther 1887:265, Pl. 54 (fig. D) [ref. 2013]. •Valid as Cyema atrum Günther 1878 -- (Bauchot & Saldanha 1973:234 [ref. 7186], Saldanha & Bauchot in Whitehead et al. 1986:557 [ref. 13676], Castle 1986:192 [ref. 5644], Matarese et al. 1989:35 [ref. 26885], Paxton et al. 1989:136 [ref. 12442], Pequeño 1989:25 [ref. 14125], Smith 1989:633 [ref. 13285], Smith 1989:944 [ref. 13285], Paulin et al. 1989:70 [ref. 24556], Saldanha 1990:203 [ref. 13839], Aizawa & Sakamoto 1993:398 [ref. 22467], Santos et al. 1997:121 [ref. 23531], Arruda 1997:57 [ref. 24952], Fricke 1999:72 [ref. 24106], Porteiro et al. 1999:27 [ref. 24203], Smith 1999:1693 [ref. 24661], Nakabo 2000:241 [ref. 25086], Mecklenburg et al. 2002:131 [ref. 25968], Hutchins 2001:18 [ref. 25847], Nakabo 2002:241 [ref. 26001], Smith 2003:757 [ref. 26989], Love et al. 2005:23 [ref. 37547], Mundy 2005:145 [ref. 28379], Shinohara et al. 2005:402 [ref. 28370], Paxton et al. 2006:304 [ref. 28994], Hartel et al. 2008:329 [ref. 29890], Melo et al. 2009:16 [ref. 30460], DeVaney et al. 2009:409 [ref. 30475], Møller et al. 2010:22 [ref. 31169], Nielsen & Stewart 2015:293 [ref. 34239], Smith 2016:1704 [ref. 34556], Burton & Lea 2019:36 [ref. 37205], Carneiro et al. 2019:69 [ref. 37250], Sutton et al. 2020:27 [ref. 37832], Love et al. 2021:40 [ref. 39279], Fermon et al. 2022:121 [ref. 39448] possible, Page et al. 2023:58 [ref. 40505], Fricke et al. 2024:136 [ref. 41622]). Current status: Valid as Cyema atrum Günther 1878. Cyematidae. Distribution: Circumglobal (including southern Gulf of California/Mexico). IUCn (2015): Least Concern. Habitat: marine.