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Holotype skull of Plesiotylosaurus crassidens (LACM 2759) on display at the Natural History Museum of Los Angeles County.

Skull of the mosasaurid squamate Thalassotitan atrox from the late Maastrichtian of Sidi Daoui, Ouled Abdoun Basin, Khouribga Province, Morocco, North Africa.

Alioramus altai skull in the exhibit, T. rex, The Ultimate Predator, in the American Museum of Natural History (with permission by Ben Miller).

Holotype of Ulughbegsaurus as well as the holotype placed on a reconstruction of Ulughbegsaurus's skull

Proceratosaurus bradleyi holotype NHMUK PV R 4860. Almost complete skull and mandibles in articulation, hyoid element and anterior cervical vertebrae in oolite block.

Proceratosaurus bradleyi holotype NHMUK PV R 4860. Almost complete skull and mandibles in articulation, hyoid element and anterior cervical vertebrae in oolite block.

Restored Placochelys placodonta skull at the Museum für Naturkunde, Berlin.

Restored Placochelys placodonta skull at the Museum für Naturkunde, Berlin.

Riojasaurus skull cast, Copenhagen.

Riojasaurus skull cast, Copenhagen.

A restoration of Rinconsaurus compared to a human , • Based proportionally on fossil elements and skeletal reconstruction featured in the Rinconsaurus description,[1] with missing parts based on other titanosaur reconstructions. The remains of Rinconsaurus represent two adults and a juvenile all of which are incomplete; some of the proportions shown here, such as the neck, limb lengths, and skull shape are not certain. • Osteroderms are not yet known in Rinconsaurus. The osteoderms shown here are based loosely on Mendozasaurus.[2] Osteoderms are known from at least 10 titanosaur genera spread across the family tree but it's not clear if all titanosaurs had them.[3] Titanosaur osteoderms are rare and their layout and position on the body are not certain. [4] • The colours and patterns, as with the majority of reconstructions of prehistoric creatures, are speculative. • Human silhouette approximately 180 cm tall. NOTE: I often update my images. If you want to have any of my images on a website, please (if possible) don’t host/save it to the website server. I’d prefer it if the image's Wikimedia URL is used. This means that if I update an image, it will be updated on the site as well. Thanks. References ↑ Coria, Jorge; B.J.G. Riga (2003). "Rinconsaurus caudamirus gen. et sp nov., a new titanosaurid (Dinosauria, Sauropoda) from the Late Cretaceous of Patagonia, Argentina". Revista Geologica de Chile 30 (2): 333–353. ISSN 0716-0208. Retrieved on 2007-05-21. ↑ González Riga B (2003) A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza, Argentina. Ameghiniana 40 (2) ↑ Carrano, M.T. and D’Emic, M.D. 2015 'Osteoderms of the titanosaur sauropod dinosaur Alamosaurus sanjuanensis Gilmore, 1922'. Journal of Vertebrate Paleontology. ↑ Vidal D, Ortega F, Sanz JL (2014) Titanosaur Osteoderms from the Upper Cretaceous of Lo Hueco (Spain) and Their Implications on the Armor of Laurasian Titanosaurs. PLoS ONE 9(8): e102488. doi:10.1371/journal.pone.0102488

A restoration of Rinconsaurus compared to a human , • Based proportionally on fossil elements and skeletal reconstruction featured in the Rinconsaurus description,[1] with missing parts based on other titanosaur reconstructions. The remains of Rinconsaurus represent two adults and a juvenile all of which are incomplete; some of the proportions shown here, such as the neck, limb lengths, and skull shape are not certain. • Osteroderms are not yet known in Rinconsaurus. The osteoderms shown here are based loosely on Mendozasaurus.[2] Osteoderms are known from at least 10 titanosaur genera spread across the family tree but it's not clear if all titanosaurs had them.[3] Titanosaur osteoderms are rare and their layout and position on the body are not certain. [4] • The colours and patterns, as with the majority of reconstructions of prehistoric creatures, are speculative. • Human silhouette approximately 180 cm tall. NOTE: I often update my images. If you want to have any of my images on a website, please (if possible) don’t host/save it to the website server. I’d prefer it if the image's Wikimedia URL is used. This means that if I update an image, it will be updated on the site as well. Thanks. References ↑ Coria, Jorge; B.J.G. Riga (2003). "Rinconsaurus caudamirus gen. et sp nov., a new titanosaurid (Dinosauria, Sauropoda) from the Late Cretaceous of Patagonia, Argentina". Revista Geologica de Chile 30 (2): 333–353. ISSN 0716-0208. Retrieved on 2007-05-21. ↑ González Riga B (2003) A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza, Argentina. Ameghiniana 40 (2) ↑ Carrano, M.T. and D’Emic, M.D. 2015 'Osteoderms of the titanosaur sauropod dinosaur Alamosaurus sanjuanensis Gilmore, 1922'. Journal of Vertebrate Paleontology. ↑ Vidal D, Ortega F, Sanz JL (2014) Titanosaur Osteoderms from the Upper Cretaceous of Lo Hueco (Spain) and Their Implications on the Armor of Laurasian Titanosaurs. PLoS ONE 9(8): e102488. doi:10.1371/journal.pone.0102488

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

Plesiolophus is a lambeosaurine hadrosaur known from the same locality, but an earlier time period than Parasaurolophus. Though it is nearly impossible to know conclusively, Plesiolophus cannot be ruled out as a direct ancestor. Like Parasaurolophus, Plesiolophus would have had a distinct crest protruding backward from its skull.

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

Kronosaurus queenslandicus (QM F18827; proposed neotype [part]) skull in dorsal view (modified from McHenry Citation2009). Scale = 30 cm.