The precise properties of Leucaltis bathybia Haeckel, 1872, recorded by several subsequent authors, remain elusive. Van Soest & De Voogd (2018) discuss its possible synonymy with Paraleucilla crosslandi (Row, 1909).
Van Soest, R.W.M.; De Voogd, N.J. (2018). Calcareous sponges of the Western Indian Ocean and Red Sea. Zootaxa. 4426 (1): 1-160.