rubra, Ellerkeldia Allen [G. R.] 1976:24, Fig. 1 [Journal of the Royal Society of Western Australia v. 59 (pt 1); ref. 7332] Off Beacon Island, Wallabi Group, Houtman Abrolhos Islands, Western Australia, depth 3-4 meters. Holotype: WAM P.25314-003. Paratypes: AMS I.18476-001 (1); USNM 214701 (1); WAM P.25226-001 (1), P.25311-007 (2). Type catalog: Hutchins & Smith 1991:18 [ref. 19335], Moore et al. 2008:19 [ref. 30117]. Subjectively invalid; secondarily preoccupied by Scopularia rubra de Buen 1959, replaced by Hypoplectrodes cardinalis Allen & Randall 1990. •Valid as Ellerkeldia rubra Allen 1976 -- (Paxton et al. 1989:505 [ref. 12442]). •Objective synonym of Hypoplectrodes cardinalis Allen & Randall 1990 -- (Gomon et al. 1994:538 [ref. 22532], Allen et al. 2006:985 [ref. 29078], Parenti & Randall 2020:14 [ref. 37354]). •Synonym of Hypoplectrodes australis (Peters 1877) -- (Gill 2023:557 [ref. 40225]). 2°Homonym. Current status: Synonym of Hypoplectrodes australis (Peters 1877). Anthiadidae. Habitat: marine.