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MALACOLOGIA v. 55 no. 2

VOL. 55, NO. 2                                                   MALACOLOGIA                                         2012
                                                                               CONTENTS
FULL PAPERS

Javier H. Signorelli
The molluscan genera Mactrella and Mactrinula: Taxonomic revision and redescription of type species .. 191
María Eugenia Torroglosa & Juliana Giménez
Spawn and reproduction of the gastropod Trochita pileus (Lamarck, 1822) from the southwestern Atlantic Ocean …………………………………………………………………………………………………………….. 203

María E. Seuffert, Lucía Saveanu & Pablo R. Martín
Threshold temperatures and degree-day estimates for embryonic development of the invasive apple snail Pomacea canaliculata (Caenogastropoda: Ampullariidae) ...................................................... 209

Timm Haun, Moritz Salinger, Adrian Pachzelt & Markus Pfenninger
On the processes shaping small-scale population structure in Radix balthica (Linnaeus 1758) …….. 219

Vanessa Liz González & Gonzalo Giribet
A new cryptic species of carditid bivalve from the Gulf of California (Mollusca, Bivalvia, Archiheterodonta, Carditidae) …………………………………………………………………………………………………………… 235

Paula Lima, Sandra M. Monteiro, Mário Sousa & Jorge Machado
A histological study of oogenesis in the freshwater mussel Anodonta cygnea (Linnaeus, 1758) in Mira Lagoon, Portugal  ……………………………………………………………………………………………… 251

Sally P. Shepardson, William H. Heard, Sophie Breton & Walter R. Hoeh
Light and transmission electron microscopy of two spermatogenic pathways and unimorphic spermatazoa in Venustaconcha ellipsiformis (Conrad, 1836) (Bivalvia: Unionoida) ………………………………….  263

Eugene V. Coan & Alan R. Kabat
The malacological works and taxa of Sylvanus Hanley (1819-1899)  ………………………………….  285

RESEARCH NOTES

Diego G. Zelaya & María Cristina Marinone
A case of phoresis of sphaeriids by corixids: First report for the Americas  …………………………… 363

Marina Güller & Diego G. Zelaya
A new species of Mysella Angas, 1877, from southern Chile (Bivalvia: Galeommatoidea) ……………..  369

INDEX .............................................................................................................................................. 373

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