arcanus, Demogorgonichthys Hart [P. B.], Niemiller [M. L.], Sandel [M. W.] & Armbruster [J. W.] in Niemiller, Armbruster, Sandel, Maxwell, Bierstein, et al. 2026:3, Figs. 1, 2B, D, 3A-C, 4B, D. [Scientific Reports v. 16: 20765; ref. 43248] Bobcat Cave, Redstone Arsenal, Madison County, Alabama, U.S.A., 34.6686°, -86.7130°. Holotype: UAIC 52236.01. Paratypes: AUM 89691 (1), 89692 (1), UAIC 52237.01 (1). •Valid as Demogorgonichthys arcanus Hart, Niemiller, Sandel & Armbruster 2026. Current status: Valid as Demogorgonichthys arcanus Hart, Niemiller, Sandel & Armbruster 2026. Amblyopsidae. Distribution: North America: Bobcat Cave, southwestern Madison County, Alabama, U.S.A. Habitat: freshwater.