This paper is the fifth in a series revising the taxonomy of New Zealand dictyoceratid sponges (phylum Porifera, subclass Ceractinomorpha, order Dictyoceratida). Six new species of the genus Spongia are added to New Zealand's known fauna. The use of subgenera within the genus Spongia is discussed, and two new subgenera are proposed. The genus Hippospongia is revised, and an emended generic diagnosis is proposed.

This paper is the third in a series revising the taxonomy of New Zealand dictyoceratid sponges (phylum Porifera, class Ceractinomorpha, order Dictyoceratida). Only one species of Ircinia has previously been described from New Zealand, Ircinia novaezealandiae Bergquist, 1961. Six new species of Ircinia are added to New Zealand's known fauna. The genus Ircinia contains in excess of 40 published species worldwide, although the in...

The status of species within the dictyo‐ceratid sponge genus Psammocinia is reviewed. The separation of Psammocinia species from the closely related Ircinia species, which has been the subject of some dispute, is clarified. This distinction made on the basis of morphological evidence is supported by the limited chemotaxonomic and molecular phylogenetic data available. Six new species of Psammocinia are described from the New Z...