The Families Rissoinidae and Rissoidae (Mollusca) from the Solanderian and Dampierian Zoogeographical Provinces

Abstract

This paper reviews taxonomically the whole, as far as is known, of the families Rissoinidae and Rissoidae (Mollusca) from northern Australia, with the addition of a number of species from Christmas Island in the Indian Ocean. The area covered includes two zoogeographical provinces, the Solanderian and the Dampierian. All species, known or proposed as new, are figured and discussed. In all, 167 species and subspecies belonging to 47 genera are reviewed, of which 131 species and sub-species and 27 genera are proposed as new. Of these, 123 come from the Solanderian Province and 37 from the Dampierian, and 6 Peronian species are now recorded from the Solanderian. Eight species were found common to the Solanderian and Dampierian. Eighteen species are described from Christmas I.