Archaeorhynchus is a genus of beaked avialans (proto-birds) from the early Cretaceous period. A fossil of its only known species, Archaeorhynchus spathula, was first discovered by Zhou & Zhang in 2006 in Yixian Formation rocks at Yixian, Liaoning province, China, showing a well-preserved and essentially complete skeleton. Two more complete specimens were found in Lower Cretaceous deposits of Jianchang, Liaoning, northeastern China, preserving new anatomical information. These deposits are 120 million years old, whereas the original specimen was 125 million years old, meaning the age range for this species is 125-120Ma.