elongatus, Trachichthys Günther [A.] 1859:10 [Catalogue of the fishes in the British Museum v. 1; ref. 1961] New Zealand. Lectotype: BMNH 1850.12.3.1. Paralectotypes: BMNH 1854.11.1.7 (1) Australia. Also listed was Plate I. fig. A, but on preface p. vi it is stated, "The Plates referred to, and executed by Mr. Ford, will be published as a separate volume." Lectotype selected by Gomon 2004:176 [ref. 27786]; the Australian specimen is probably Optivus agostos. •Valid as Optivus elongatus (Günther 1859) -- (Paulin et al. 1989:152 [ref. 24556], Paulin & Roberts 1992:134 [ref. 24625], Kuiter 1993:72 [ref. 23929], Francis 1993:159 [ref. 25479], Kotlyar 1996:180 [ref. 23292], Kuiter 1997:58 [ref. 25488], Johnson 1999:725 [ref. 25471], Gomon 2004:173 [ref. 27786], Gomon 2008:426 [ref. 30616], Duffy & Ahyong 2015:111 [ref. 36167], Roberts & Gomon 2015:1016 [ref. 34279]). Current status: Valid as Optivus elongatus (Günther 1859). Trachichthyidae. Distribution: Southwestern Pacific: New Zealand, Kermadec Islands. Habitat: marine.