Dr. Susana E. Damborenea has studied Natural Sciences (Geology) at the University of La Plata, Argentina, and at the University of Wales. She has had several teaching positions at the Facultad de Ciencias Naturales y Museo of the Universidad Nacional de La Plata, Argentina. Her present position is Professor of Invertebrate Palaeontology at La Plata University, Argentina. She teaches graduate and postgraduate courses on Palaeontology. Her research interests include invertebrate palaeontology, Mesozoic South American molluscs (especially Jurassic of Argentina), bivalve systematics, biostratigraphy, palaeoecology of marine environments and palaeobiogeography of southern Hemisphere regions.

• Introduction.--Paleobiogeography and neobiogeography.--Why bivalves?.--Time frame.--Paleogeography.--Paleoclimates and water temperatures.--Paleocurrents.-Techniques.--The data.--Quantification: a difficult approach.--Analytic methods.-A bivalve perspective.--Previous research: a northern hemisphere affair.--Some general issues.--Paleobiogeographic affinities.-Regional scale.--Facies and bivalve distributions: examples from the Neuquén Basin.--Latitudinal gradients.--Distribution patterns and boundaries.-Hemispheric scale.--Data.--Biochoreme recognition.--Evolution of biochoremas.--Evolution of biochoreme boundaries and its causes.--Congruence.--Paleobiogeographic units and mass extinctions.Global scale.--Bipolarity.--Seaways: the Hispanic Corridor.--Oceanic currents.--Evolution of global biochoreme boundaries.

Dr. Susana E. Damborenea has studied Natural Sciences (Geology) at the University of La Plata, Argentina, and at the University of Wales. She has had several teaching positions at the Facultad de Ciencias Naturales y Museo of the Universidad Nacional de La Plata, Argentina. Her present position is Professor of Invertebrate Palaeontology at La Plata University, Argentina. She teaches graduate and postgraduate courses on Palaeontology. Her research interests include invertebrate palaeontology, Mesozoic South American molluscs (especially Jurassic of Argentina), bivalve systematics, biostratigraphy, palaeoecology of marine environments and palaeobiogeography of southern Hemisphere regions.

• Introduction.--Paleobiogeography and neobiogeography.--Why bivalves?.--Time frame.--Paleogeography.--Paleoclimates and water temperatures.--Paleocurrents.-Techniques.--The data.--Quantification: a difficult approach.--Analytic methods.-A bivalve perspective.--Previous research: a northern hemisphere affair.--Some general issues.--Paleobiogeographic affinities.-Regional scale.--Facies and bivalve distributions: examples from the Neuquén Basin.--Latitudinal gradients.--Distribution patterns and boundaries.-Hemispheric scale.--Data.--Biochoreme recognition.--Evolution of biochoremas.--Evolution of biochoreme boundaries and its causes.--Congruence.--Paleobiogeographic units and mass extinctions.Global scale.--Bipolarity.--Seaways: the Hispanic Corridor.--Oceanic currents.--Evolution of global biochoreme boundaries.

Dr. Susana E. Damborenea has studied Natural Sciences (Geology) at the University of La Plata, Argentina, and at the University of Wales. She has had several teaching positions at the Facultad de Ciencias Naturales y Museo of the Universidad Nacional de La Plata, Argentina. Her present position is Professor of Invertebrate Palaeontology at La Plata University, Argentina. She teaches graduate and postgraduate courses on Palaeontology. Her research interests include invertebrate palaeontology, Mesozoic South American molluscs (especially Jurassic of Argentina), bivalve systematics, biostratigraphy, palaeoecology of marine environments and palaeobiogeography of southern Hemisphere regions.

• Introduction.--Paleobiogeography and neobiogeography.--Why bivalves?.--Time frame.--Paleogeography.--Paleoclimates and water temperatures.--Paleocurrents.-Techniques.--The data.--Quantification: a difficult approach.--Analytic methods.-A bivalve perspective.--Previous research: a northern hemisphere affair.--Some general issues.--Paleobiogeographic affinities.-Regional scale.--Facies and bivalve distributions: examples from the Neuquén Basin.--Latitudinal gradients.--Distribution patterns and boundaries.-Hemispheric scale.--Data.--Biochoreme recognition.--Evolution of biochoremas.--Evolution of biochoreme boundaries and its causes.--Congruence.--Paleobiogeographic units and mass extinctions.Global scale.--Bipolarity.--Seaways: the Hispanic Corridor.--Oceanic currents.--Evolution of global biochoreme boundaries.