This study of the little known north-eastern Atlantic mytilid Modiolarca subpicta suggests a more intimate relationship with ascidians and, especially, Ascidiella aspersa, than has hitherto been appreciated. Both live for ~18 months and the reproductive

The ovulid gastropod Xandarovula patula (Pennant, 1777) was found 14.vi.2011 on the soft coral Alcyonium digitatum Linnaeus, 1758 (Dead man’s fingers) during a dive in the central North Sea on the wreck ‘Jeanette Kristina’ on the Dutch Dogger Bank. Later

There are fossil Mytiloidea assigned to the Septiferinae such as Coxesia mezzalirai and species of Admytilus and Assytilus. Extant species of the Septiferinae are assigned to Septifer and Mytilisepta and date from the end of the Triassic, >200 mya, and