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Letter concerning the discovery of the 1823 Plesiosaurus, from Mary Anning.. This timeline of plesiosaur research is a chronologically ordered list of important fossil discoveries, controversies of interpretation, taxonomic revisions, and cultural portrayals of plesiosaurs, an order of marine reptiles that flourished during the Mesozoic Era.
A = Anapsid, B = Synapsid, C = Diapsid. It was traditionally assumed that first reptiles were anapsids, having a solid skull with holes only for the nose, eyes, spinal cord, etc.; [10] the discoveries of synapsid-like openings in the skull roof of the skulls of several members of Parareptilia, including lanthanosuchoids, millerettids, bolosaurids, some nycteroleterids, some procolophonoids and ...
Coelurosauria (/ s ɪ ˌ lj ʊər ə ˈ s ɔːr i. ə /; [3] [4] from Greek, meaning "hollow-tailed lizards") is the clade containing all theropod dinosaurs more closely related to birds than to carnosaurs.
Tyrannosauridae (or tyrannosaurids, meaning "tyrant lizards") is a family of coelurosaurian theropod dinosaurs that comprises two subfamilies containing up to fifteen genera, including the eponymous Tyrannosaurus. The exact number of genera is controversial, with some experts recognizing as few as three.
Another nodosaur from Texas. Tenontosaurus: Lower Cretaceous: herbivore: An iguanodontid whose remains have been found in Texas, Oklahoma and Maryland. [2] [3] [citation needed] Zephyrosaurus: Lower Cretaceous: herbivore: A small ornithopod endemic to Laramidia. Possible tracks have been discovered in Maryland and Virginia.
Alamosaurus (/ ˌ æ l əm oʊ ˈ s ɔːr ə s /; [1] meaning "Ojo Alamo lizard") is a genus of titanosaurian sauropod dinosaurs containing a single known species, Alamosaurus sanjuanensis, from the Maastrichtian age of the Late Cretaceous period in what is now southwestern North America.
Zephyrosaurus (meaning "westward wind lizard") is a genus of orodromine ornithischian dinosaur.It is based on a partial skull and postcranial fragments discovered in the Aptian-Albian-age Lower Cretaceous Cloverly Formation of Carbon County, Montana, USA.
Convolosaurus (/ ˌ k ɒ n v ə l ə ˈ s ɔːr ə s /, meaning "flocking lizard" after the concentration of juvenile fossils found) is a genus of basal ornithopod dinosaur from the Twin Mountains Formation from Proctor Lake in Comanche County, Texas. The type and only species is Convolosaurus marri. [1]