alphacrucis, Sciadonus Melo [M. R. S. de], Gomes [A. A.], Møller [P. R.] & Nielsen [J. G.] 2021:2, Figs. 1-8 [Deep-Sea Research Part I: Oceanographic Research Papers v. 180 [for 2022]; ref. 38956] Continental slope off Ilhabela, São Paulo State, southeastern Brazil, western South Atlantic, 24°53'55.80"S, 44°24'13.80"W, depth 794 meters. Holotype: MZUSP 125949. Paratype: MZUSP 125950 (1). •Valid as Sciadonus alphacrucis Melo, Gomes, Møller & Nielsen 2021. Current status: Valid as Sciadonus alphacrucis Melo, Gomes, Møller & Nielsen 2021. Bythitidae. Distribution: Western South Atlantic: off southeastern Brazil. Habitat: marine.