VOL. 52, NO. 1 MALACOLOGIA 2010 CONTENTS FULL PAPERS Benoît Dayrat Anatomical Re-Description of the Terrestrial Onchidiid Slug Semperoncis montana (Plate, 1893) ......................................... 1 Kahori Aizaki & Yoichi Yusa Learned Predator Recognition in a Freshwater Snail, Pomacea canaliculata .. 21 Javier H. Signorelli & Fabrizio Scarabino Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), Two Long Misunderstood Species from Southwestern Atlantic Ocean ............ 31 Janek von Byern & Waltraud Klepal Re-Evaluation of Taxonomic Characters of Idiosepius (Cephalopoda, Mollusca) 43 Kevin T. Hall, Mitchell B. Baker & Michael G. Hadfield Using Dispersal Rates to Guide Translocation Across Impermeable Wildlife Reserve Boundaries: Hawaiian Tree Snails as a Practical Example ............. 67 Valerio Ketmaier, Giuseppe Manganelli, Ralph Tiedemann & Folco Giusti Peri-Tyrrhenian Phylogeography in the Land Snail Solatopupa guidoni (Pulmonata) 81 Jerzy Dzik Brachiopod Identity of the Alleged Monoplacophoran Ancestors of Cephalopods 97 Ellen E. Strong & Matthias Glaubrecht Anatomy of the Tiphobiini from Lake Tanganyika (Cerithioidea, Paludomidae) 115 RESEARCH NOTES Jill M. Y. Chiu, Paul K. S. Shin, Koon-Pun Wong & Siu-Gin Cheung Sibling Cannibalism in Juveniles of the Marine Gastropod Nassarius festivus (Powys, 1835) ........................................ 157 María J. Madeira, María A. Elejalde, Luis J. Chueca, Benjamín J. Gómez-Moliner Phylogenetic Position of the Genus Cryptazeca and the Family Azecidae within the System of the Stylommatophora .......................... 163 Brent Vadopalas, Theodore W. Pietsch & Carolyn S. Friedman The Proper Name for the Geoduck: Resurrection of Panopea generosa Gould, 1850, from the Synonymy of Panopea abrupta (Conrad, 1849) (Bivalvia: Myoida: Hiatellidae) .......................................... 169 Jesús D. Nuñez, Marcelo A. Scelzo & Maximiliano Cledón Regeneration of the Inhalant Siphon of Mesodesma mactroides (Deshayes, 1854) (Mollusca: Bivalvia) ..................................... 175 Rüdiger Bieler On the Names of Some Western Atlantic Lithophaga Species (Bivalvia: Mytilidae) 181 Rüdiger Bieler & Richard E. Petit Thylacodes – Thylacodus – Tulaxodus: Worm-Snail Name Confusion and the Status of Serpulorbis (Gastropoda: Vermetidae) .................. 183 LETTER TO THE EDITOR Daniel L. Graf & Kevin S. Cummings Comments on the Value of COI for Family-Level Freshwater Mussel Systematics: A Reply to Hoeh, Bogan, Heard & Chapman ...................... 191 INDEX 199.