Revision of the species of the Hydaticus (Prodaticus) pacificus group of the Palearctic, Oriental and Australian Regions, and description of a new species of the H. (P.) bihamatus group (Coleoptera: Dytiscidae). Koleopterologische Rundschau, 86, Sep 2016: 9-45. 27 [Zoological Record Volume 153]