VOL. 53, NO. 1 MALACOLOGIA 2010

CONTENTS FULL PAPERS Julia Pizá & Néstor J. Cazzaniga Allopatry and anatomical distinctiveness of two puzzling land snails in Plagiodontes, from Argentina (: Orthalicidae, Odontostominae) .. 1 Andrea C. Walther, John B. Burch & Diarmaid Ó Foighil Molecular phylogenetic revision of the freshwater limpet genus Ferrissia (Planorbidae: Ancylinae) in North America yields two : Ferrissia (Fer- rissia) rivularis and Ferrissia (Kincaidilla) fragilis ...... 25 Verónica Núñez, Diego E. Gutiérrez Gregoric & Alejandra Rumi Freshwater gastropod provinces from Argentina ...... 47 Leandro M. Pérez, Santiago F. Genta Iturrería & Miguel Griffin Paleoecological and paleobiogeographic significance of two new species of bivalves in the Paraná Formation (Late ) of Entre Ríos Province, Argentina ...... 61 Robert A. D. Cameron, Beata M. Pokryszko & Michal Horsák Land snail faunas in Polish forests: Patterns of richness and composition in a post-glacial landscape ...... 77 Wallace M. Meyer III & Robert H. Cowie Feeding preferences of two predatory snails introduced to Hawaii and their conservation implications ...... 135

RESEARCH NOTES Shu H. Zhang, Qin P. Zhao, Ran Jiao, Qian Gao & Pin Nie Identification of polymorphic microsatellites for the intermediate host Oncomelania hupensis of Schistosoma japonicum in China ...... 147 Luke C. Strotz, Briony L. Mamo, Timothy P. Topper & Collette Bagnato The highest southern latitude record of a living Tridacna gigas ...... 155 Gabriel Mouahid, Rodrigue Mintsa Nguema, Mohamed A. Idris, Mahmoud A. Shaban, Salem Al Yafee, Juliette Langand, Marion Verdoit-Jarraya, Richard Galinier & Hélène Moné High phenotypic frequencies of complete albinism in wild populations of Biomphalaria pfeifferi (Gastropoda: ) ...... 161 Cristián Ituarte, María Gabriela Liuzzi & Romina Centurión Egg hull morphology in two chitons (Polyplacophora) from the southwestern Atlantic Ocean ...... 167 María S. Avaca, Maite Narvarte & Pablo R. Martín Description of the radula of Buccinanops globulosus (, Nas- sariidae) and an assessment of its variability in northern Patagonian gulfs .. 175 Katharina C. M. Heiler, Nahid Nahavandi & Christian Albrecht A new invasion into an ancient lake – the invasion history of the dreissenid mussel Mytilopsis leucophaeata (Conrad, 1831) and its first record in the Caspian Sea ...... 185 Florencia Arrighetti & Pablo E. Penchaszadeh Size and age at first sexual maturity of the edible giant snail Adelomelon beckii (Neogastropoda: Volutidae) from Mar del Plata, Argentina ...... 193