2 literature references for Oceanapia aerea (Topsent, 1904):

Author: Van Soest, R.W.M.
Year: 2001
Title: Porifera, in: Costello, M.J. et al. (Ed.) (2001).
Source: European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50:
Author: Topsent, E.
Year: 1904
Title: Spongiaires des Açores. Résultats des campagnes scientifiques accomplies par le Prince Albert I.
Source: Monaco 25: 1-280, pls 1-18.