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The dioramic landscape illustrates the Early Cretaceous Jehol Biota, with emphasis on mammaliamorphs. (Credit: Chuang Zhao) (CN) Researchers uncovered two fossils of 145 million-year-old scratch-digger species in northeastern China, revealing clues about their evolutionary timelines and the conditions they existed in. The fossils of the two distantly related species belong to a reptilian, mammal-like creature called a tritylodont and to a eutriconodontan, which is a distant relative of modern marsupials and placental mammals. The two species scientific names Fossiomanus sinensis and Jueconodon cheni, respectively roamed Earth between 100 and 145 million years ago during the Early Cretaceous epoch. The roughly 12.4 inch long tritylodont fossil was discovered in the Jiufotang formation, a site in the Liaoning province of China which over multiple decades has yielded important fossils of prehistoric birds, amphibians and fish.

Fangyuan maoChuang zhaoJin mengEarly cretaceousEarly cretaceous jehol biotaசுங் ழோஜின் மெங்ஆரம்ப கிரேதாஸோஸ்