Busutil, L., M. R. García-Hernández, M. C. Díaz, and S. A. Pomponi. “Mesophotic Sponges of the Genus Callyspongia (Demospongiae, Haplosclerida) from Cuba, With the Description of Two New Species”. Zootaxa, vol. 4466, no. 1, Aug. 2018, pp. 78–94, doi:10.11646/zootaxa.4466.1.9.