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Collage of three leptoceratopsids, clockwise from top left: Prenoceratops, Montanoceratops and Leptoceratops. These files are already on Commons with their respective licenses. This montage was made for the article Leptoceratopsidae on Wikipedia. File:The Childrens Museum of Indianapolis - Prenoceratops pieganensis -1.jpg File:Montanoceratops Royal Tyrrell 1.jpg File:Leptoceratopsidae - Leptoceratops.JPG File:Leptoceratops skull Royal Tyrrell.jpg

Central Museum of Mongolian Dinosaurs, Ulaanbaatar. Complete indexed photo collection at WorldHistoryPics.com.

Reconstructed skull of Einiosaurus procurvicornis on display at the Natural History Museum of Los Angeles County.

Restoration of the skeleton, Age of Dinosaur Museum, Winton, Australia

Giganotosaurus skeleton mount at the Fernbank Museum of Natural History in Atlanta, Georgia.

Maiasaura peeblesorum skeletal mount, Brussels Natural History museum (2009).

Fossil samples – e.g. ‘primitive’ bony fish (1, 2), a skull of a temnospondyl ‘amphibian’ (probably a metoposauroid) in dorsal view (3), a skull of an archosaur of the crocodile lineage (probably a phytosaur) in palatal view (4), holotype of the “gliding reptile” Icarosaurus siefkeri [1] (5) and Atreipus-Grallator-type dinosaur tracks (bottom right) – from the Newark Supergroup, i.e. a series of mainly Late Triassic to Early Jurassic sedimentary rocks of eastern North America ↑ Edwin H. Colbert: A gliding reptile from the Triassic of New Jersey. American Museum Novitates, 2230. American Museum of Natural History, New York 1966, digitallibrary.amnh.org, cf. fig. 3 therein.

Archaeopteryx lithographica, specimen displayed at the Museum für Naturkunde in Berlin. (This image shows the original fossil - not a cast.)

Type skull of Pentaceratops sternbergii, American Museum of Natural History # AMNH6325

Mounted skeleton of Acrocanthosaurus specimen NCSM 14345 at North Carolina Museum of Natural Sciences

An Ankylosaurus head (cast of specimen AMNH 5214), on display at the Museum of the Rockies in Bozeman, Montana. This is from a specimen collected in Custer County, Montana. The Ankylosauria were armored dinosaurs that lived from 122 million years ago to 66 million years ago in western North America, Europe, and East Asia. There were two subgroups: The Nodosauridae and Ankylosauridae. The Ankylosauridae contained six species, and a single subfamily -- the Ankylosaurinae. There 18 genus within the subfamily, of which Ankylosaurus is the best known. Ankylosaurus as the last of these, and lived 65.5 to 66.5 million years ago. Ankylosaurus was about 20.5 feet long, 5 feet wide, and 5.5 feet tall at the hip. It walked on all fours, with the rear legs longer than the front ones. They ripped vegetation, and swallowed it whole. Their defining feature was their armor. They body was covered in thick, heavy bony plates, and most of the plates were fused together to make them even stronger. Embedded in the skin were more knobs of bone, and the outer skin above these knobs covered in keratin (the same stuff fingernails are made of). Ankylosaurus had a tail club, which consisted of several large osteoderms fused to the last few tail vertebrae. Ankylosaurus was discovered in 1908.

Chasmosaurus on display at the Royal Ontario Museum.

The "Dinosaurs in Their Time" exhibit at the Carnegie Museum of Natural History. Pictures from some of my free time during the Project Zero Perspectives conference (#PZPGH) in Pittsburg, Pennsylvania - May 2017.

Ajancingenia mounted cast (labeled as Ingenia), on display at the Museum of Ancient Life, Utah.

Ajancingenia mounted cast (labeled as Ingenia), detail of pelvis, on display at the Museum of Ancient Life, Utah.

Ajancingenia mounted cast (labeled as Ingenia), detail of skull, on display at the Museum of Ancient Life, Utah.