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Résumé Depuis plus d’un siècle, les recherches à Madagascar ont permis de découvrir 17 espèces de lémuriens éteints, tous de grande taille. Ils pratiquaient des locomotions qui ne se rencontrent plus aujourd’hui chez les lémuriens actuels. Certains présentaient des convergences morphologiques avec des Catarrhiniens ou d’autres groupes de Mammifères. Peu de choses étaient connues pour le Nord-Ouest...
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