Callyspongia differentiata (Dendy, 1922)

Dendy, A. 1922b. Report on the Sigmatotetraxonida collected by H. M. S. ‘Sealark’ in the Indian Ocean. Pp. 1-164, pls 1-18. In: Reports of the Percy Sladen Trust Expedition to the Indian Ocean in 1905, Volume 7. Transactions of the Linnean Society