Give the name of first organism.Which showed oviparity in.Mammals
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The earliest-known eutherian mammal hunting on a tree fern. A shrew-like animal that snagged insects from ferns lining the shores of freshwater lakes 160 million years ago, might be one of the first "true" mammals to walk the Earth, back when the dinosaurs roamed, a new fossil suggests.
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Cnidaria,Ctenophora,Echinodermata,Mollusca and some other phyla as well.
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