Van Soest & De Voogd (2018) discovered that molecular sequences (partial 28S) of this species are not found in the same clade as most other Ernstia species (E. tetractina, E. arabica, E. naturalis, E. klautauae). It is likely a member of Ascandra.
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.