Alectrosaurus
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Alectrosaurus is a genus of tyrannosauroid theropod dinosaur that lived in Asia during the Late Cretaceous period, about some 96 million years ago in what is now the Iren Dabasu Formation.
Excavation of the right hindlimb of A. olseni specimen AMNH 6554, in 1923. George Olsen on the right
Holotype right pes of A. olseni, American Museum of Natural History
Restoration of two Gigantoraptors protecting their nest from two Archaeornithomimus and an Alectrosaurus
Xiongguanlong
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Xiongguanlong is an extinct genus of tyrannosauroid theropod from the Early Cretaceous period of what is now China. The type and only species is X. baimoensis. The generic name comes from Jiayuguan Ci
A size comparison of several small tyrannosauroids, Xiongguanlong is labeled (2)
The skulls of various tyrannosauroids with Xiongguanlong labeled (F)
A skeletal mount of Xiongguanlong alsongside Beishanlong depicting a predator-prey relationship