theropod

Acrocanthosaurus

Acrocanthosaurus, meaning “high-spined lizard”, was a large 35 foot long meat-eating dinosaur which lived in North America during the middle of the Cretaceous Period approximately 115-110 million years ago. It is distinctive for the unusually tall neural spines on the… Read More ›

Kelmayisaurus

Kelmayisaurus was an obscure species of large meat-eating dinosaur which lived in northwestern China (the region sometimes referred to as Uyghurstan) during the early to middle Cretaceous Period 130-120 million years ago. In 1964, fossils belonging to several dinosaur species… Read More ›

Alectrosaurus

Alectrosaurus was a small tyrannosauroidean theropod dinosaur which lived in Mongolia during the middle of the Cretaceous Period around 95 million years ago. It is known from partial remains belonging to several individuals, but their incompleteness makes it difficult to… Read More ›

Gigantoraptor

Gigantoraptor was a massive 25-30 foot long oviraptorosaurian theropod dinosaur which lived in eastern Asia (and possibly in North America) during the middle of the Cretaceous Period. The fossils of this enormous bird-like dinosaur, consisting of a partial skeleton, were… Read More ›

Martharaptor

Martharaptor was a therizinosaur theropod dinosaur which lived in Utah during the early Cretaceous Period approximately 135-132 million years ago. Therizinosaurs are known mostly from the middle and later parts of the Cretaceous Period. Fossils dating to the early Cretaceous… Read More ›

Adasaurus

Adasaurus mongoliensis was a dromaeosaurid theropod dinosaur (commonly referred to as a “raptor“) which lived in Mongolia during the late Cretaceous Period about 70 million years ago. Fragmentary remains were found during the 1970s, and it was officially named and… Read More ›

Conchoraptor

Conchoraptor, meaning “shell robber”, was a small bird-like dinosaur barely measuring 5 feet long. Its fossils were discovered in 1971 within the rocks of the Nemegt Formation of Mongolia, but they were believed to belong to its more well-known relative… Read More ›

Falcarius

Falcarius was a 12 foot long theropod dinosaur which lived in Utah during the early Cretaceous Period, approximately 139 to 136 million years ago. It was a very primitive therizinosaur – so primitive that it still bears a close resemblance… Read More ›