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The status of five genera recognized within subfamily Buccininae (Buccinidae) is critically re-assessed based on the molecular phylogenetic analysis of the cox-1, 16S, and 28S gene fragments. Our results suggest restoring Volutharpa P. Fischer, 1856 from synonymy of Buccinum and we also consider Plicibuccinum Golikov & Gulbin, 1977 as valid genus. New molecular data provide further support for the synonimization of Bathybuccinum Golikov & Sirenko, 1988 with Buccinum Linnaeus, 1758. Furthermore, our data demonstrate that Thysanobuccinum Golikov #38; Gulbin in Golikov, 1980 and Ovulatibuccinum Golikov & Sirenko, 1988 as currently construed are nested within Buccinum and their subgeneric rank is not confirmed. Therefore, we synonymize these genera with Buccinum. In the absence of molecular data the monotypic genus Corneobuccinum Golikov & Gulbin, 1977 is provisionally considered valid. Two new species, Buccinum hasegawai sp. nov. and B. bizikovi sp. nov. are described from the Kurile Islands; these species were previously erroneously identified as Bathybuccinum bombycinum (Dall, 1907) and Ovulatibuccinum ovulum (Dall, 1907), respectively. New replacement names are proposed for the secondary junior homonym Buccinum perlatum (Fraussen & Chino, 2009) and the primary junior homonyms Buccinum coronatum Golikov, 1980 and Buccinum costatum Golikov 1980.
The genus Profundiconus Kuroda, 1956 is reviewed. The morphological characters of the shell, radular tooth and internal anatomy of species in Profundiconus are discussed. In particular, we studied Profundiconus material collected by dredging in deep water during different scientific campaigns carried out in the Solomon Islands, Madagascar, Papua New Guinea and New Caledonia. We reconstructed a phylogeny of 55 individuals based on partial mitochondrial cox1 gene sequences. The phylogeny shows several clades containing individuals that do not match any of the known species of Profundiconus based on their shell and radular morphologies, and are introduced here as five new species: Profundiconus maribelae sp. nov. from the Solomon Islands; P. virginiae sp. nov. from Chesterfield Plateau (New Caledonia); P. barazeri sp. nov. from Chesterfield Plateau and the Grand Passage area (New Caledonia); P. puillandrei sp. nov. from Norfolk Ridge (New Caledonia), Kermadec Ridge (New Zealand) and possibly Balut Island (Philippines); and P. neocaledonicus sp. nov. from New Caledonia. Furthermore, Profundiconus teramachii forma neotorquatus (da Motta, 1984) is raised to specific status as P. neotorquatus (da Motta, 1984).