Sphaerotylus exotylotus Koltun, 1970

Koltun, V. M. 1970. Sponge fauna of the northwestern Pacific from the shallows to the hadal depths. Pp. 165-221. In: Bogorov, V. G. (Ed. ), Fauna of the Kurile-Kamchatka Trench and its environment. Institute of Oceanology of the Academy of Sciences