Recently (2014), Sim & Kim described 8 new species from a single locality, Chuuk in the Federated State of Micronesia. This doubled the number of species reported for this genus. A critical evaluation of the specific distinctness of these sympatric species appears necessary.
Sim, C. J.; Kim, Y. A. (2014). Eight New Species of Genus Coscinoderma (Demospongiae: Dictyoceratida: Spongiidae) from Chuuk Island, The Federated States of Micronesia. Animal Systematics, Evolution and Diversity. 30(4): 248-259. Available for editors [request]