Acristavus (/”a-KRIS-tah-vus”/; “uncrested grandfather”) is a genus of hadrosaurid dinosaur that lived during the Late Cretaceous period, approximately 80 to 78 million years ago, in what is now North America. The first fossils of Acristavus were discovered in Montana and Utah, and the dinosaur was scientifically described in 2011. The name Acristavus comes from the […]
Acrocanthosaurus (/”AK-ro-KAN-tho-SAWR-us”/; “high-spined lizard”) is a genus of very large, meat-eating dinosaur. It belonged to a group called carcharodontosaurid theropods and lived during the Early Cretaceous period, approximately 113 to 110 million years ago. Fossils of Acrocanthosaurus have been discovered mainly in North America, in states like Oklahoma, Texas, and Wyoming. The name Acrocanthosaurus comes
Acrotholus (/”AK-roh-THO-luss”/; “highest dome”) is a genus of pachycephalosaurid dinosaur that lived during the Late Cretaceous period. Its fossils date to the Santonian stage, approximately 85.8 to 83.5 million years ago. These remains were discovered in the Milk River Formation of Alberta, Canada. The genus was scientifically described in 2013 by paleontologists David C. Evans,
