A common Mediterranean species of
Phorbas has been frequently identified under the specific name
paupertas, referring to the sponge described as
Hymeniacidon paupertas by Bowerbank 1866 from the north coasts of Europe. It is actually different from this species, and a new name,
Phorbas topsenti sp.nov., is proposed. A description of the morphology, spicule complement and cytology is given. Another Mediterranean species of
Phorbas,
Phorbas tailliezi sp. nov. is described.