problematicus, Diaphus Parr [A. E.] 1928:143, Fig. 32 [Bulletin of the Bingham Oceanographic Collection Yale University v. 3 (art. 3); ref. 3368] Tongue of the Ocean, Bahamas, 24°29'N, 77°29'W, 8000 feet wire out. Holotype: YPM 2195. Paratypes: YPM 2194 (1). Type catalog: Moore & Boardman 1991:21 [ref. 16741]. •Valid as Diaphus problematicus Parr 1928 -- (Paxton 1979:9 [ref. 6440], Fujii in Uyeno et al. 1983:178 [ref. 14275], Fujii in Masuda et al. 1984:74 [ref. 6441], Hulley 1986:294 [ref. 5672], Paxton et al. 1989:259 [ref. 12442], Hulley 1990:418 [ref. 15273], Paxton et al. in Fischer et al. 1995:1320 [ref. 22830], McEachran & Fechhelm 1998:641 [ref. 23897], Paxton & Hulley 1999:1963 [ref. 24748], Nakabo 2000:397 [ref. 25086], Paxton & Hulley in Randall & Lim 2000:593 [ref. 25122], Hutchins 2001:20 [ref. 25847], Nakabo 2002:397 [ref. 26001], Santos et al. in Menezes et al. 2003:53 [ref. 27192], Hartel & Craddock 2003:950 [ref. 27005], Moore et al. 2003:199 [ref. 27076], Shinohara et al. 2005:411 [ref. 28370], Paxton et al. 2006:517 [ref. 28994], Fricke et al. 2011:361 [ref. 31242], Lins Oliveira et al. 2015:80 [ref. 37485], Pinheiro et al. 2015:8 [ref. 34324], Hulley 2016:1894 [ref. 34576], Fricke et al. 2018:77 [ref. 35805], Sutton et al. 2020:179 [ref. 37832] in subgenus Aethoprora, Eduardo et al. 2022:8 [ref. 39574], Page et al. 2023:95 [ref. 40505]). Current status: Valid as Diaphus problematicus Parr 1928. Myctophidae: Diaphinae. Distribution: Circumglobal, but not in eastern Pacific. Habitat: marine.