Luo, Zhexi Section of Vertebrate Fossils, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania.
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A group of extinct mammals that range from the Late Triassic to Late Cretaceous. Their fossil remains have been found in Mesozoic deposits worldwide. These small insectivorous or carnivorous mammals are the size of a shrew or mouse. They are considered to be distant relatives of the more derived therian mammals, including the extinct eupantotheres, such as dryolestids and the living placental and marsupial mammals.
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