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Type species: Haplocheirus sollers

Location: Shishugou Formation, Xinjiang, China

Age: Late Jurassic; Oxfordian, 160 million years ago

Haplocheirus is the oldest known alvarezsaurid, a group of strange bird-like dinosaurs (or dinosaur-like birds) that have been found solely in the Cretaceous of the Americas and Asia. Its presence in the Jurassic confirms the idea that the maniraptorans diverged earlier than Archaeopteryx. It is known from a nearly complete skeleton, though its skull shows characteristics of a late juvenile animal. It had small teeth with serrations, suggesting this animal was carnivorous. Later alvarezsaurids had more pointed teeth without serrations.

Resources:

"Dinodata - Haplocheirus sollers"

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