australis, Synaphobranchus Regan [C. T.] 1913:235, Pl. 8 (fig. 5) [Transactions of the Royal Society of Edinburgh v. 49 (pt 2, no. 2); ref. 3651] Southern Indian Ocean; South Atlantic. Syntypes: BMNH 1887.12.4.255 (1) 46°46'S, 45°31'E, Challenger station 146, depth 2515 meters; NMSZ 1921.143.318 (1) 48°06'S, 10°05'W, depth 1742 fathoms. Type catalog: Herman et al. 1990:1 [ref. 20727]. •Synonym of Histiobranchus bathybius (Günther 1877) -- (Blache et al. 1973:252 [ref. 7185], Castle 1986:189 [ref. 5644], Robins & Robins 1989:230 [ref. 13287], Gon 1990:103 [ref. 21680], Duhamel et al. 2005:92 [ref. 32059]). •Valid as Synaphobranchus australis Regan 1913 -- (Karmovskaya & Merrett 1998:1026 [ref. 23683]). •Valid as Histiobranchus australis (Regan 1913) -- (Mundy 2005:129 [ref. 28379], Paxton et al. 2006:262 [ref. 28995], Smith 2008:162 [ref. 30621], Melo et al. 2009:13 [ref. 30460] as cf. australis, Almeida & Biscoito 2012:495 [ref. 32244], Smith & Stewart 2015:242 [ref. 34234], Carneiro et al. 2019:58 [ref. 37250]). Current status: Valid as Histiobranchus australis (Regan 1913). Synaphobranchidae: Synaphobranchinae. Distribution: Southern Hemisphere: all oceans; also the Azores. Habitat: marine.