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  1. By: MacPhee, R. D. E. - Hernández del Pino, Santiago. - Bond, Mariano. - Kramarz, Alejandro - Forasiepi, Analía Marta - Sulser, R. Benjamin,
    Publication info: [New York], American Museum of Natural History, [2021]
    Holding Institution: American Museum of Natural History Library
    Subjects: 1902-1984  Anatomy  Braincasts of Phenacodus, Notostylops, and Rhyphod  Eocene  Eocene Geologic Epoch  From 40 to 55 million years ago  Mammals, Fossil  Morphology  Paleontology  Phylogeny  Simpson, George Gaylord,  Skull  South America  Ungulates  Ungulates, Fossil