DinoDay: Dilophosaurus

DinoDay: Dilophosaurus

Dilophosaurus is a genus of theropod dinosaurs that lived in what is now North America during the Early Jurassic, about 193 million years ago. Three skeletons were discovered in northern Arizona in 1940, and the two best preserved were collected in 1942. The most complete specimen became the holotype of a new species in the genus Megalosaurus, named M. wetherilli by Samuel P. Welles in 1954. Welles found a larger skeleton belonging to the same species in 1964. Realizing it bore crests on its skull, he assigned the species to the new genus Dilophosaurus in 1970, as Dilophosaurus wetherilli. The genus name means "two-crested lizard", and the species name honors John Wetherill, a Navajo councilor. Further specimens have since been found, including an infant. Footprints have also been attributed to the animal, including resting traces. Another species, Dilophosaurus sinensis from China, was named in 1993, but was later found to belong to the genus Sinosaurus.

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DinoDay: Velociraptor Mongoliensis

Velociraptor (ve·loc·i·rap·tor) (Swift seizer or thief) was a small carnivorous dinosaur, well known thanks to Jurassic Park. It was one of the smaller dromaeosaurs, smaller than Utahraptor and Deinonychus, and was about 2 meters long. It lived in Mongolia and China during the Late Cretaceous, 75 to 71 million years ago. Fossils found in 2007 show that Velociraptor had long feathers on its forearms.

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New Tiger's family

DinoDay: Brontosaurus

"Thunder Lizard" in Greek) is an extinct genus of apatosaurian sauropod dinosaur which lived throughout North America during the late Jurassic period, approximately 155 to 145 million years ago. It was originally considered to be a junior synonym of Apatosaurus, but is know regarded as a separate taxon after extensive scientific exploration conducted in 2015 revealed their were substantial differences between the two genera (for example, Brontosaurus can be defined as having a slimer build and slightly smaller in size).