Omalogyridae are minute gastropods with a shell diameter usually less than one millimeter and have a worldwide distribution. A reinvestigation of the type species, Omalogyra atomus (Philippi, 1841), should help to unravel the systematic affi nities of this family. Furthermore, direct comparisons of previous and the present results enable the evaluation of the advantages of the innovative method...

Abstract In this paper six heterobranch mollusc species are reported for the first time Bosnia and Herzegovina: Berthellina edwardsi (Vayssiere, 1896), Felimida luteorosea (Rapp, 1827), Thuridilla hopei (Verany, 1853), Dendrodoris grandiflora Camachoaglaja africana (Pruvot-Fol, 1953) Felimare villafranca (Risso, 1818). The study was conducted in October 2021 on Klek Peninsula Neum Bay (eastern ...

Forty gastropod species of the subclass Heterobranchia are described from Upper Jurassic (Upper Kimmeridgian) reefal limestones South Germany, including ten in open nomenclature and further uncertain identity. Six new to science: Ceritella convexa sp. nov. , Nerinea donosa Endoplocus acutus inflatus Pseudonerinea ? pseudomelaniformis Itieroptygmatis cylindrata A lectotype is designated for Ptyg...