Alioramus: Profile of the ‘Different Branch’ Tyrannosaur Alioramus Alioramus (AL-ee-oh-RAY-mus; “Different Branch”) is a genus of tyrannosaurid theropod dinosaur that lived during the Late Cretaceous period, about 70 million years ago, in what is now Mongolia, Asia. The name Alioramus comes from Latin words meaning ‘different branch,’ referring to its unique features compared to other […]
Aliwalia: Profile of a Prehistoric Giant Aliwalia Aliwalia (AH-lee-WAH-lee-ah; “from Aliwal North”) was a name given to what scientists initially believed was a large, predatory dinosaur that lived during the Late Triassic period, approximately 227 to 208 million years ago. The fossils attributed to it were discovered in South Africa and first described by paleontologist
Allosaurus Allosaurus (AL-oh-SAWR-us; “different lizard”) is a genus of large carnivorous theropod dinosaur that roamed the Earth during the Late Jurassic period, approximately 155 to 145 million years ago. Its fossils have been found primarily in the Morrison Formation of North America, with some possible remains discovered in Portugal. The name Allosaurus comes from the
Almas Almas (AHL-mahs; “Wild Man”) Almas is a genus of troodontid theropod dinosaur that lived during the Late Cretaceous period, approximately 75 to 71 million years ago. Its fossils were discovered in the Djadochta Formation in the Gobi Desert of Mongolia, specifically at a rich fossil site known as Ukhaa Tolgod. The name “Almas” comes
Altirhinus: Profile of a Prehistoric Giant Altirhinus Altirhinus (AL-tih-RYE-nus; “High Snout”) is a genus of iguanodontian ornithopod dinosaur that lived during the Early Cretaceous period, approximately 125 to 100 million years ago. Its fossils were discovered in Mongolia. The name Altirhinus refers to the tall, arched structure on the upper part of its snout, in
Altispinax Altispinax (AL-tih-SPY-nax; “High spines” or “Lofty spines”) is a genus of large carnivorous theropod dinosaur that lived during the Early Cretaceous period, approximately 140 to 130 million years ago. Fossils of Altispinax have been found in what is now England, and possibly Germany. The name refers to the very tall spines on its back
Alvarezsaurus (AL-vahr-ez-SAWR-us; “Alvarez’s lizard”) is a genus of small alvarezsaurid theropod dinosaur that lived during the Late Cretaceous period, approximately 86 to 83 million years ago (Campanian stage), in what is now Argentina. The name honors the historian Don Gregorio Alvarez, who was from the Neuquén Province where the fossils were found. Alvarezsaurus was first
Alvarezsaurus: Profile of a Prehistoric Giant Alvarezsaurus Alvarezsaurus (AL-vahr-ez-SAWR-us; “Alvarez’s lizard”) is a genus of small alvarezsaurid theropod dinosaur that lived during the Late Cretaceous period, approximately 86 to 83 million years ago (Campanian stage), in what is now Argentina. The name honors the historian Don Gregorio Alvarez, who was from the Neuquén Province where
Alwalkeria Alwalkeria (AL-walk-EAR-ee-ah; “A.W. Walker’s reptile”) is a genus of small, early saurischian dinosaur that lived during the Late Triassic period, approximately 228 to 216 million years ago. Its fossils were discovered in the Maleri Formation of Andhra Pradesh, India. The dinosaur was first named Walkeria in 1987 by paleontologist Sankar Chatterjee, but this name
Alxasaurus: Profile of a Prehistoric Giant Alxasaurus Alxasaurus (ALK-shah-SAWR-us; “Alxa Desert lizard”) Alxasaurus is a genus of therizinosaurian dinosaur that lived during the Early Cretaceous period, approximately 113 to 100 million years ago. Its fossils were discovered in the Bayin-Gobi Formation of Inner Mongolia, China. The name refers to the Alxa Desert (also known as
