immaculatus, Heliastes Ogilby [J. D.] 1885:446 [Proceedings of the Linnean Society of New South Wales v. 10 (pt 2); ref. 3262] Shark Reef, Port Jackson, New South Wales, Australia. Holotype: AMS B.7452. Paratypes: (several) ?AMS B.7450-51 (1, 1). Original genus should have been Heliases. •Valid as Mecaenichthys immaculatus (Ogilby 1885) -- (Allen 1991:245 [ref. 19344], Kuiter 1993:234 [ref. 23929], Kuiter 1997:252 [ref. 25488], Johnson 1999:741 [ref. 25471], Allen 2001:3344 [ref. 26132], Allen et al. 2006:1458 [ref. 29090], Parenti 2021:66 [ref. 38418]). Current status: Valid as Mecaenichthys immaculatus (Ogilby 1885). Pomacentridae: Microspathodontinae. Distribution: Southwestern Pacific: New South Wales (Australia) endemic. Habitat: marine.