microdon, Echiostoma Günther [A.] 1878:180 [13] [Annals and Magazine of Natural History (Series 5) v. 2 (nos 7/8/9)(art. 2/22/28); ref. 2010] Off northwestern coast of Australia [eastern Indian Ocean], Challenger station 181, depth 2440 fathoms. Holotype (unique): BMNH 1887.12.7.226. On p. 13 of separate. See also Günther 1887:210, Pl. 53 (fig. C) [ref. 2013]. •Valid as Pachystomias microdon (Günther 1878) -- (Gibbs in Whitehead et al. 1984:361 [ref. 13675], Fujii in Masuda et al. 1984:51 [ref. 6441], Gibbs 1986:242 [ref. 5655], Paxton et al. 1989:202 [ref. 12442], McAllister 1990:96 [ref. 14674], Gibbs & Barnett 1990:332 [ref. 14915], Balanov & Fedorov 1996:344 [ref. 24646], McEachran & Fechhelm 1998:532 [ref. 23897], Fricke 1999:90 [ref. 24106], Harold 1999:1913 [ref. 24741], Nakabo 2000:331 [ref. 25086], Randall & Lim in Randall & Lim 2000:591 [ref. 25122], Sheiko & Fedorov 2000:21 [ref. 25650], Mecklenburg et al. 2002:226 [ref. 25968], Hutchins 2001:19 [ref. 25847], Nakabo 2002:331 [ref. 26001], Harold 2003:912 [ref. 27001], Moore et al. 2003:192 [ref. 27076], Love et al. 2005:39 [ref. 37547], Mundy 2005:188 [ref. 28379], Paxton et al. 2006:450 [ref. 28995], Hartel et al. 2008:331 [ref. 29890], Kenaley et al. 2008:254 [ref. 30630], Parin et al. 2014:149 [ref. 33547], Kenaley & Stewart 2015:530 [ref. 34248], Harold 2016:1815 [ref. 34568], Schnell & Johnson 2017:5 [ref. 35193], Brown et al. 2019:159 [ref. 36444], Carneiro et al. 2019:102 [ref. 37250], Misawa et al. 2020:272 [ref. 38138], Sutton et al. 2020:81 [ref. 37832], Love et al. 2021:60 [ref. 39279], Eduardo et al. 2022:7 [ref. 39574], Fermon et al. 2022:178 [ref. 39448], Villarins et al. 2022:43 [ref. 39442], Page et al. 2023:89 [ref. 40505], Reading & Horton 2023:12 [ref. 41317]). Current status: Valid as Pachystomias microdon (Günther 1878). Stomiidae: Melanostomiinae. Distribution: Circumglobal in tropical and temperate seas. Habitat: marine.