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Information from Wikipedia on these rodent-like mammals that first appeared in the middle Jurassic and became extinct in the early Oligocene.
Provides information on this major branch of mammals with a 100 million year fossil history which became completely extinct and have no living descendants.
Provides information on this diverse lineage of Mesozoic to early Cenozoic mammals with details of its biology and anatomy and an illustration of the Paleocene multituberculate, Ptilodus.