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Last updated on April 17, 2014 at 21:23 EDT

Phanerozoic Reference Libraries

Page 2 of about 24 Articles
Staurikosaurus
2011-02-25 17:38:22

Staurikosaurus, meaning "Southern Cross lizard," is a genus of dinosaur from the Carnian age of the Late Triassic Period (225 million years ago). The first known specimen was recovered from the paleontological site Jazigo Cinco of the Santa Maria Formation, in Rio Grande do Sul, Brazil. The genus name refers to the star constellation, "The Southern Cross," pictured in the coat of arms of...

Saurornitholestes
2011-01-03 17:35:28

Saurornitholestes, meaning "lizard-bird thief," is a genus of dromaeosaurids dinosaur from the Campanian stage of the Late Cretaceous Period (75 million years ago) of what is now Alberta, Canada. It was discovered in the badlands of Dinosaur Provincial Park in Alberta. Most of the partial skeletons and fossil fragments of this dinosaur are housed at the Royal Tyrrell Museum of Paleontology, in...

Unaysaurus
2011-01-03 17:21:11

Unaysaurus, meaning "black water lizard," is a genus of sauropodomorph dinosaur from the Carnian to Norian ages of the Late Triassic Period (225 to 200 million years ago). It was discovered in southern Brazil, which at that time was connected to northwest Africa. During the reign of Unaysaurus, the world was united as the supercontinent Pangaea, which was just starting to break up into the...

Protarchaeopteryx
2010-12-14 23:07:05

Protarchaeopteryx, meaning "before Archaeopteryx," is a genus of feathered theropod dinosaur from the Aptian age of the Early Cretaceous Period (124 million years ago). It was found in the Jianshangou bed of the Yixian Formation in what is now China. It was most likely more primitive than Archaeopteryx, making it a non-avian theropod dinosaur rather than a true avian bird. Protarchaeopteryx...

Thecodontosaurus
2010-10-07 11:23:25

Thecodontosaurus, meaning "socket-tooth lizard," is a genus of sauropodomorph dinosaur from the Norian or Rhaetian age of the Late Triassic Period. Known mainly from "fissure fillings" found in South England and Wales, the original remains were destroyed by the Germans during World War II bombings. However, more fossils have been found at a number of different sites. Some of the new...

Torvosaurus
2010-09-29 15:30:41

Torvosaurus, meaning "savage lizard," is a genus of large theropod dinosaur from the late Kimmeridgian to early Tithonian stage of the Late Jurassic Period. Fossils of Torvosaurus have been found in North America and Portugal. It was first discovered by James Jensen and Kenneth Stadtman in the Morrison Formation at Dry Mesa Quarry, Colorado in 1972. The genus and type species, T. tanneri,...

Santanaraptor
2010-09-16 16:54:13

Santanaraptor, meaning "Santana Formation thief", is a genus of theropod dinosaur from the Albian or Aptian stage of the Early Cretaceous Period (108 million years ago). It lived in what is now South America. When first discovered, Santanaraptor was thought to be a maniraptoran theropod. However, it is now thought to be a primitive coelurosaur based on features present on the femur. The...

Alioramus
2010-02-03 16:23:27

Alioramus, meaning "˜different branch', is a genus of theropod dinosaur from the Late Cretaceous Period (70 to 65 million years ago) from what is now Asia. It is known from a partial skull and three metatarsals (foot bones). It was discovered in the Gobi Desert in the early 1970s by a Soviet-Mongolian expedition. The fossil was found at Nogon-Tsav in the Mongolian province of Bavankhongor in...

Mamenchisaurus
2010-02-03 15:08:36

Mamenchisaurus, meaning "Mamenchi lizard" (from the Chinese words ma: "horse", men: "gate", and chi: "brook"), is a genus of dinosaur from the Tithonian age of the Late Jurassic Period (150 to 145 million years ago). It was first discovered in 1952 on a highway construction site in Sichuan, China. It was studied and named in 1954 by paleontologist Professor C.C. Young. A second specimen was...

Kentrosaurus
2010-02-03 14:32:40

Kentrosaurus, meaning "pointed lizard", is a genus of stegosaur dinosaur from the Late Jurassic Period of what is now Tanzania. It is related to the better known Stegosaurus of North America. It was discovered in the Tendaguru Formation from the Kimmeridgian stage from 156 to 151 million years ago. It was first described by Edwin Hennig in 1915. The type species is K. aethiopicus. It is...