Synechodus was a genus of prehistoric saltwater shark which lived from the early Permian Period until the late Eocene Epoch of the Paleogene Period, 290 to 37 million years ago (Ivanov 2005, pages 127-138). Fossils of this animal reached around… Read More ›

Asia
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 ›
Wuerhosaurus
Wuerhosaurus was a stegosaur dinosaur which lived in China during the early and middle Cretaceous Period. It was one of the last stegosaurs to have existed, as they had largely been replaced elsewhere in the world by the ankylosaurians by… Read More ›
Lissodus
Lissodus was a prehistoric shark which lived from the early Triassic to the middle Cretaceous Period, about 250 to 110 million years ago, give or take. Named in 1835, it was a member of a group of sharks called the… Read More ›
Polyacrodus
Polyacrodus was a genus of prehistoric shark, composed of several species, with fossils found in North America, South America, Europe, Asia, and Africa. The name Polyacrodus means “tooth with many bumps”, and it was officially named by the German paleontologist… Read More ›
Cretaceous Stegosaurs in North America? Maybe
Stegosaurus stenops. © Jason R. Abdale (August 1, 2020) Stegosaurus is one of the most famous dinosaurs in the world. With its large back plates and spiked tail, it’s commonly seen in every child’s dinosaur book and is one of… Read More ›
Nedcolbertia: A North American elaphrosaur?
IntroductionNedcolbertia (named in honor of the American paleontologist Dr. Edward “Ned” Colbert, 1905-2001) was a mysterious and intriguing creature which inhabited western North America during the early Cretaceous Period about 140-130 million years ago. When it was officially named and… Read More ›
Semionotus
Semionotus was a genus of prehistoric fish which lived throughout the world during much of the Mesozoic Era. It was named by the famous Swiss ichthyologist and paleontologist Louis Agassiz in 1843 (type species: Semionotus bergeri). Semionotus first appeared during… Read More ›
An Ornithocheirid Pterosaur
An ornithocheirid pterosaur. © Jason R. Abdale (February 13, 2022). The “ornithocheirids” were a group of pterosaurs which dominated the skies during the early and middle parts of the Cretaceous Period from about 140 to 90 million years ago. They… Read More ›