List of North American dinosaurs

This is a list of dinosaurs whose remains have been recovered from North America. North America has a rich dinosaur fossil record with great diversity of dinosaurs.

History

The earliest record of dinosaurs in North America comes from rare, unidentified (possibly theropod) footprints and teeth in the Middle-Late Triassic Pekin Formation of North Carolina.[1] Later in the Triassic period, dinosaurs left more recognizable remains, and could thus be identified as specific genera. Examples of later Triassic North American dinosaur genera include Coelophysis, Chindesaurus, Gojirasaurus, and Tawa. Fossils of Tawa-like dinosaurs have also been found in South America, which has important indications about paleogeography. During the Early Jurassic Period, dinosaurs such as Dilophosaurus, Anchisaurus, Coelophysis (formerly known as Megapnosaurus), and the early thyreophoran Scutellosaurus lived in North America. The latter is believed to have been the ancestor of all stegosaurs and ankylosaurs. The Middle Jurassic is the only poorly represented time period in North America, although several Middle Jurassic localities are known from Mexico. Footprints, eggshells, teeth, and fragments of bone representing theropods, sauropods, and ornithopods have been found, but none of them are diagnostic to the genus level.

The Late Jurassic of North America, however, is the exact opposite of the Middle Jurassic. The Late Jurassic Morrison Formation is found in several U.S. states, including Colorado, Utah, Wyoming, Montana, New Mexico, Oklahoma, South Dakota, and Texas. It is notable as being the most fertile single source of dinosaur fossils in the world. The roster of dinosaurs from the Morrison is impressive. Among the theropods, Allosaurus, Saurophaganax, Torvosaurus, Ceratosaurus, Coelurus, Ornitholestes, Tanycolagreus, Stokesosaurus, and Marshosaurus are found in the Morrison. An abundance of sauropods has been found there, including Apatosaurus, Diplodocus, Barosaurus, Brachiosaurus, Camarasaurus, Brontosaurus and Amphicoelias. Three genera of stegosaurs, Alcovasaurus, Stegosaurus and Hesperosaurus, have been found there. Finally, ornithopods found in the Morrison include Dryosaurus, Camptosaurus, Drinker, Othnielia, and Othnielosaurus.

During the Early Cretaceous, new dinosaurs evolved to replace the old ones. Sauropods were still present, but they were not as diverse as they were in the Jurassic Period. Theropods from the Early Cretaceous of North America include dromaeosaurids such as Deinonychus and Utahraptor, Acrocanthosaurus, and Microvenator. Sauropods included Astrodon, Brontomerus, and Sauroposeidon. Ornithischians were more diverse than they were in the Jurassic Period. Tenontosaurus, Dakotadon, Protohadros, and Eolambia are some of the ornithopods that lived during this time period. Ankylosaurs replaced their stegosaur cousins in the Cretaceous. Ankylosaurs from the Early Cretaceous of North America include Sauropelta and Gastonia. Therizinosaurs such as Falcarius are also known from the Early Cretaceous of North America.

Finally, during the Late Cretaceous Period, the greatest abundance and diversity of dinosaurs of all time lived in North America. During the early part of the Late Cretaceous, the therizinosaur Nothronychus and the ceratopsian Zuniceratops lived. During the Campanian stage of the Late Cretaceous, an enormous diversity of dinosaurs is known. Theropods included the tyrannosaurs Albertosaurus, Gorgosaurus, Daspletosaurus, Teratophoneus, Bistahieversor, and Appalachiosaurus, and the dromaeosaurids Dromaeosaurus, Saurornitholestes, Atrociraptor, and Bambiraptor. Ceratopsians, such as Pachyrhinosaurus, Styracosaurus, Centrosaurus, Monoclonius, Brachyceratops and Pentaceratops also existed. Among hadrosaurs, Hypacrosaurus, Gryposaurus, Kritosaurus, Parasaurolophus, Corythosaurus, Lambeosaurus and Prosaurolophus existed. During the latest Cretaceous, the Maastrichtian age, the diversity of dinosaurs saw a decline from the preceding Campanian stage. North American herbivorous dinosaurs from this time period include the titanosaur sauropod Alamosaurus, the ceratopsians Bravoceratops, Regaliceratops, Triceratops, Leptoceratops, Torosaurus, Nedoceratops, Tatankaceratops (the latter two possible species of Triceratops), and Ojoceratops, the pachycephalosaurs Pachycephalosaurus, Stygimoloch, Dracorex, and Sphaerotholus, the hadrosaurs Augustynolophus, Saurolophus and Edmontosaurus, the ornithopod Thescelosaurus the ankylosaur Ankylosaurus and the nodosaurs Denversaurus, Glyptodontopelta and Edmontonia. Predatory dinosaurs from this time period included the tyrannosaurids Tyrannosaurus, Nanotyrannus (which may just be a juvenile of the former) and Dryptosaurus, the ornithomimids Ornithomimus, Dromiceiomimus, Struthiomimus, the oviraptorids Anzu, Leptorhynchos and Ojoraptorsaurus, the troodontids Pectinodon, Paronychodon and Troodon, the coelurosaur Richardoestesia and the dromaeosaurs Acheroraptor and Dakotaraptor.

The only dinosaur fossil from Central America currently is a femur of an ornithopod.,[2][3] discovered in the central part of Honduras in the year 1971 near San Luis, Comayagua Department, by Bruce Simonson and Gregory Horne. It was found in the highest part of the Valle de Angeles Redbeds. The fossil bone is in the US National Museum of Natural History in Washington (catalog number USNM PAL 181339). It was identified as ornithopod bone by John Ostrom,[3] and by Nicholas Hotton as the right femur of a small hadrosaur.[4]

There is also an older report of dinosaur fossil from Honduras documented only in US newspapers at 1933, but not scientifically documented . This report comments the discovery of a dinosaur ankle bone near the town of Olanchito, Yoro Department, Honduras; by the explorer Gregory Mason. This information is described on page 9 of The Washington Post of August 23, 1933, on page 8 of the newspaper The Norwalk Hour August 24, 1933[5] and on page 6 of Nebraska newspaper The Plattsmouth Journal of August 21 of 1933[6]

Criteria for inclusion

Inclusion criteria:

• The creature must appear on the List of dinosaur genera.
• Fossils of the creature must have been found in North America.
• This list is a complement to Category:Dinosaurs of North America.

List

Alamosaurus.

Albertaceratops.

Allosaurus.

Anchiceratops.

Ankylosaurus.

Apatosaurus.

Barosaurus.

Brachyceratops.

Camarasaurus.

Cerasinops.

Ceratosaurus.

Coelophysis.

Coelurus.

Deinonychus.

Diabloceratops.

Dilophosaurus.

Diplodocus.

Edmontonia.

Edmontosaurus.

Gryposaurus.

Monoclonius.

Rubeosaurus.

Saurolophus.

Scutellosaurus.

Stegosaurus.

Titanoceratops.

Torvosaurus.

Triceratops.

Tyrannosaurus.

Utahceratops.

Utahraptor.

Zuniceratops.

Key

Nomen dubium

Invalid

Nomen nudum

Name	Period	Diet[7]	State (Country)	Notes
Abydosaurus	Cretaceous	herbivore	USA	Last known sauropod in North America until appearance of Alamosaurus
Achelousaurus	Cretaceous	herbivore	USA	A "transitional form" between two other species of ceratopsians.
Acheroraptor	Cretaceous	carnivore	USA	One of the last dromaeosaurs.
Acristavus	Cretaceous	herbivore	USA	An early hadrosaur with no crest on its snout.
Acrocanthosaurus	Cretaceous	carnivore	USA	A large predator with a hump or sail on its back.
Acrotholus	Cretaceous	herbivore	Canada	North America's oldest pachycephalosaur.
Agathaumas	Cretaceous	herbivore	USA	Dubious, see article
Agujaceratops	Cretaceous	herbivore	USA	Formerly a species of Chasmosaurus.
Ahshislepelta	Cretaceous	herbivore	USA	An ankylosaur.
Akainacephalus	Cretaceous	herbivore	USA	A recently described well-preserved ankylosaur.
Alamosaurus	Cretaceous	herbivore	Texas (USA)	The last known sauropod from North America.
Alaskacephale	Cretaceous	herbivore	Alaska (USA)	A pachycephalosaur.
Albertaceratops	Cretaceous	herbivore	Alberta (Canada)	A basal centrosaurine ceratopsian. Montanan specimen reclassified as Medusaceratops
Albertadromeus	Cretaceous	herbivore	Canada	A small ornithischian.
Albertonykus	Cretaceous	carnivore/insectivore	Canada	One of North America's smallest adult non-avian dinosaurs.
Albertosaurus	Cretaceous	carnivore	Canada	Fossil evidence suggests it may have hunted in packs.
Alcovasaurus	Jurassic	herbivore	USA	Formerly a species of Stegosaurus and Natronasaurus.
Aletopelta	Cretaceous	herbivore	USA	Its remains were found in California, thought it may have lived closer to Mexico in life.
Allosaurus	Jurassic	carnivore	Colorado, Montana, New Mexico, Kansas, Nebraska, Arizona, Idaho, Texas, North Dakota, Oklahoma, South Dakota, Utah, Wyoming (USA) Portugal & Tanzania	As one of the first well-known theropod dinosaurs, it has long attracted attention outside of paleontological circles. Fossils also found in Europe & Africa.
Amphicoelias	Jurassic	herbivore	USA	A sauropod.
Anasazisaurus	Cretaceous	herbivore	USA	Intertwined with Gryposaurus and Kritosaurus throughout its history.
Anchiceratops	Cretaceous	herbivore	Alberta (Canada)	A ceratopsian.
Anchisaurus	Jurassic	herbivore	USA	A small basal sauropodomorph.
Angulomastacator	Cretaceous	herbivore	USA	A hadrosaur with an unusually-shaped jaw.
Animantarx	Cretaceous	herbivore	USA	Discovered during a radiological survey of the fossil site.
Ankylosaurus	Cretaceous	herbivore	Montana (USA)	Known for its heavily armored back.
Anodontosaurus	Cretaceous	herbivore	Canada	Formerly congeneric with Euoplocephalus.
Antrodemus	Jurassic	carnivore	Probably synonymous with Allosaurus, see article
Anzu	Cretaceous	omnivore	USA	A large oviraptorosaur.
Apatodon	Jurassic	carnivore	USA	Highly dubious, see article
Apatosaurus	Jurassic	herbivore	Colorado, Oklahoma, New Mexico, Utah (USA)	Formerly congeneric with Brontosaurus
Appalachiosaurus	Cretaceous	carnivore	USA	One of the few non-avian dinosaurs from the eastern side of North America.
Aquilarhinus	Cretaceous	herbivore	USA	A hadrosaur from Big Bend National Park in Texas, described in 2019.
Arkansaurus	Cretaceous	omnivore	USA	A nomen nudum for 41 years before being officially described in 2018.
Arrhinoceratops	Cretaceous	herbivore	Canada	A ceratopsian.
Astrodon	Cretaceous	herbivore	USA	State dinosaur of Maryland.
Astrophocaudia	Cretaceous	herbivore	USA	A sauropod.
Atlantosaurus	Jurassic	herbivore	USA	Probably the same as Apatosaurus.
Atrociraptor	Cretaceous	carnivore	Canada	A close relative of Saurornitholestes.
Augustynolophus	Cretaceous	herbivore	USA	State dinosaur of California.
Aublysodon	Cretaceous	carnivore	USA	Dubious, see article.
Avaceratops	Cretaceous	herbivore	USA	A small ceratopsian.
Bambiraptor	Cretaceous	carnivore	USA	Named after the familiar character due to its small size.
Barosaurus	Jurassic	herbivore	USA	Probably one of the largest dinosaurs.
Beelemodon	Jurassic	carnivore	USA	Possibly a coelurosaur.
Bistahieversor	Cretaceous	carnivore	USA	A tyrannosaur.
Brachiosaurus	Jurassic	herbivore	USA	A familiar sauropod.
Brachyceratops	Cretaceous	herbivore	USA	Only juvenile fossils found so far
Brachylophosaurus	Cretaceous	herbivore	USA and Canada	A hadrosaur known from several well-preserved "mummies"
Bravoceratops	Cretaceous	herbivore	USA	A large ceratopsian.
Brontomerus	Cretaceous	herbivore	USA	Possibly dubious.
Brontosaurus	Jurassic	herbivore	USA	Formerly congeneric with Apatosaurus.
Camarasaurus	Jurassic	herbivore	Probably the most common sauropod of Late Jurassic times.
Camposaurus	Triassic	carnivore	A coelophysoid theropod.
Camptosaurus	Jurassic	herbivore	A large, stocky ornithopod.
Capitalsaurus	Cretaceous	carnivore	Official dinosaur of the District of Columbia. The intersection near where it was found is now nicknamed "Capitalsaurus Court".
Caseosaurus	Triassic	carnivore	Possibly the same as Chindesaurus.
Cathetosaurus	Jurassic	herbivore	Formerly congeneric with Camarasaurus, split due to its unusual proportions.
Cedarosaurus	Cretaceous	herbivore	A large Early Cretaceous sauropod.
Cedarpelta	Cretaceous	herbivore	Shows a strange mix of primitive and advanced features.
Cedrorestes	Cretaceous	herbivore	The specific name, crichtoni, honors the author of Jurassic Park.
Centrosaurus	Cretaceous	herbivore	Not to be confused with Kentrosaurus
Cerasinops	Cretaceous	herbivore	A small basal ceratopsian.
Ceratops	Cretaceous	herbivore	Type genus of the Ceratopsia and the Ceratopsidae. Currently considered dubious.
Ceratosaurus	Jurassic	carnivore	A large predator with armor scutes along its back.
Chasmosaurus	Cretaceous	herbivore	A ceratopsian known from multiple remains.
Chindesaurus	Triassic	carnivore	A herrerasaurid saurischian.
Chirostenotes	Cretaceous	carnivore	An oviraptorosaur originally known from assorted body parts.
Cionodon	Cretaceous	herbivore	A hadrosaur.
Claorhynchus	Cretaceous	herbivore	Dubious, see article
Claosaurus	Cretaceous	herbivore	A small basal hadrosauroid.
Coahuilaceratops	Cretaceous	herbivore	Has the longest brow horns of any ceratopsian.
Coelophysis	Triassic/Jurassic	carnivore	A populous, long-lived genus. Includes "Megapnosaurus" and "Syntarsus".
Coelurus	Jurassic	carnivore	The genus the Coelurosauria was named after.
Coelosaurus	Cretaceous	carnivore	This name is preoccupied, but by what is unknown.
Colepiocephale	Cretaceous	herbivore	The name means "kuncklehead".
Comanchesaurus	Triassic	carnivore	Possibly an indeterminate saurischian.
Coronosaurus	Cretaceous	herbivore	Once a species of Centrosaurus.
Corythosaurus	Cretaceous	herbivore	A hadrosaur with a crest that resembles half a dinner plate.
Daemonosaurus	Triassic	carnivore	An early theropod with a short snout and "buck teeth".
Dakotadon	Cretaceous	herbivore	Once an American species of Iguanodon.
Dakotaraptor	Cretaceous	carnivore	Latest known dromaeosaurid
Daspletosaurus	Cretaceous	carnivore	Possibly the direct ancestor of T. rex
Deinodon	Cretaceous	carnivore	Dubious, see article
Deinonychus	Cretaceous	carnivore	Its discovery suggests non-avian dinosaurs were warm-blooded creatures, and influenced the design of Velociraptor in Jurassic Park.
Diabloceratops	Cretaceous	herbivore	One of the oldest centrosaurine ceratopsid.
Diclonius	Cretaceous	herbivore	Shares its name with an alien race in the manga series Elfen Lied.
Dilophosaurus	Jurassic	carnivore	Despite its appearance in the film Jurassic Park, it didn't have frills and probably couldn't spit poison.
Diplodocus	Jurassic	herbivore	A long, low sauropod.
Diplotomodon	Cretaceous	carnivore	Confused with various other vertebrates throughout its history.
Dracorex	Cretaceous	herbivore	Possibly a juvenile Pachycephalosaurus.
Drinker	Jurassic	herbivore	Named after paleontologist Edward Drinker Cope.
Dromaeosaurus	Cretaceous	carnivore	Type genus of the Dromaeosauridae (the "raptors")
Dromiceiomimus	Cretaceous	omnivore	One of the fastest non-avian dinosaurs.
Dryosaurus	Jurassic	herbivore	A large, fast ornithopod.
Dryptosaurus	Cretaceous	carnivore	Best known from a painting by Charles Knight.
Dyoplosaurus	Cretaceous	herbivore	Has a convoluted taxonomic history.
Dynamoterror	Cretaceous	carnivore	A recently described tyrannosaur from New Mexico.
Dysganus	Cretaceous	herbivore	A ceratopsid.
Dyslocosaurus	Jurassic	herbivore	It may have had four toes on its hindlegs (unlike other sauropods which only have three)
Dystrophaeus	Jurassic	herbivore	Recently found to be a dicraeosaurid.
Edmontonia	Cretaceous	herbivore	Known for its double-pointed shoulder spikes.
Edmontosaurus	Cretaceous	herbivore	Includes "Anatotitan"
Einiosaurus	Cretaceous	herbivore	A ceratopsian with a forward-curving horn on its nose.
Eolambia	Cretaceous	herbivore	A hadrosauroid.
Eotrachodon	Cretaceous	herbivore	One of the few non-avian dinosaurs from Appalachia.
Eotriceratops	Cretaceous	herbivore	Possibly the largest species of ceratopsian.
Epanterias	Jurassic	carnivore	May be the same as Allosaurus.
Epichirostenotes	Cretaceous	carnivore	An oviraptorosaur.
Euoplocephalus	Cretaceous	herbivore	Known from several good specimens.
Falcarius	Cretaceous	herbivore/omnivore	A transitional form between carnivorous theropods and herbivorous therizinosaurs.
Ferrisaurus	Cretaceous	herbivore	A leptoceratopsid; the first non-avian dinosaur described from British Columbia, Canada.
Fruitadens	Jurassic	omnivore	One of the smallest non-avian dinosaurs.
Galeamopus	Jurassic	herbivore	Formerly assigned to Diplodocus.
Gargoyleosaurus	Jurassic	herbivore	A Jurassic ankylosaur.
Gastonia	Cretaceous	herbivore	An ankylosaur with multiple shoulder spikes.
Geminiraptor	Cretaceous	carnivore	A troodontid.
Glishades	Cretaceous	herbivore	Possibly a juvenile of an already known species.
Glyptodontopelta	Cretaceous	herbivore	One of the last nodosaurids.
Gojirasaurus	Triassic	carnivore	A predator named after Godzilla because of its size.
Gorgosaurus	Cretaceous	carnivore	A tyrannosaur.
Gravitholus	Cretaceous	herbivore	A relatively obscure pachycephalosaur.
Gryphoceratops	Cretaceous	herbivore	A leptoceratopsid ceratopsian.
Gryposaurus	Cretaceous	herbivore	A hadrosaur that may have eaten crabs.
Hadrosaurus	Cretaceous	herbivore	The first non-avian dinosaur found in North America.
Hagryphus	Cretaceous	carnivore	A relatively large oviraptorosaur.
Hanssuesia	Cretaceous	herbivore	Formerly a species of Stegoceras.
Haplocanthosaurus	Jurassic	herbivore	Either a diplodocid or a macronarian.
Hesperonychus	Cretaceous	carnivore	A small dromaeosaur.
Hesperosaurus	Jurassic	herbivore	A stegosaur that may have possessed sexual dimorphism.
Hippodraco	Cretaceous	herbivore	An ornithopod.
Hoplitosaurus	Cretaceous	herbivore	A poorly-known ankylosaur.
Huehuecanauhtlus	Cretaceous	herbivore	One of the few known ornithopods from Mexico.
Hypacrosaurus	Cretaceous	herbivore	A hadrosaur that may have cared for its young.
Hypsibema	Cretaceous	herbivore	State dinosaur of Missouri.
Iguanacolossus	Cretaceous	herbivore	An ornithopod.
Jeyawati	Cretaceous	herbivore	Named after the Zuni for "grinding mouth".
Judiceratops	Cretaceous	herbivore	The oldest chasmosaurine ceratopsian.
Kaatedocus	Jurassic	herbivore	A sauropod known for its "toothy smile".
Kayentavenator	Jurassic	carnivore	A large theropod of the Early Jurassic.
Koparion	Jurassic	carnivore	Possibly an early troodontid.
Kosmoceratops	Cretaceous	herbivore	Has the most horns of any ceratopsian.
Kritosaurus	Cretaceous	herbivore	A hadrosaur with a large bump on its nose.
Labocania	Cretaceous	carnivore	An indeterminate theropod, possibly a tyrannosaur or a carcharodontosaurid.
Lambeosaurus	Cretaceous	herbivore	A hadrosaur with a hollow, hatchet-shaped crest.
Laosaurus	Jurassic/Cretaceous	herbivore	Possibly the same as another of the Morrison neornithischians.
Latenivenatrix	Cretaceous	carnivore	Formerly assigned to Troodon.
Latirhinus	Cretaceous	herbivore	Not to be confused with Altirhinus.
Leptoceratops	Cretaceous	herbivore	A basal ceratopsian that lived towards the end of the Mesozoic.
Leptorhynchos	Cretaceous	omnivore	An oviraptorosaur.
Lophorhothon	Cretaceous	herbivore	The first non-avian dinosaur found in Alabama.
Lythronax	Cretaceous	carnivore	A tyrannosaur with one tooth larger than the rest of its teeth.
Magnapaulia	Cretaceous	herbivore	A very large hadrosaur.
Magulodon	Cretaceous	herbivore	Not to be confused with megalodon.
Maiasaura	Cretaceous	herbivore	Its fossils suggest hadrosaurs cared for their young.
Marshosaurus	Jurassic	carnivore	A carnivore related to Megalosaurus.
Martharaptor	Cretaceous	carnivore	A therizinosaur.
Medusaceratops	Cretaceous	herbivore	Named after the snake-haired woman of Greek myth, which its horns are said to resemble.
Mercuriceratops	Cretaceous	herbivore	Named after the winged messenger of the gods in Roman mythology.
Microcephale	Cretaceous	herbivore	Possibly a very tiny pachycephalosaur.
Microvenator	Cretaceous	carnivore	An oviraptorosaur.
Moabosaurus	Cretaceous	herbivore	First appeared as a nomen nudum in 2006 and only formally described in 2017.
Mojoceratops	Cretaceous	herbivore	Probably the same as Chasmosaurus.
Monoclonius	Cretaceous	herbivore	Probably the same as Centrosaurus.
Montanoceratops	Cretaceous	herbivore	A basal ceratopsian originally thought to have a horn on its snout.
Moros	Cretaceous	carnivore	A small-bodied basal tyrannosauroid.
Mymoorapelta	Jurassic	herbivore	A Jurassic ankylosaur.
Naashoibitosaurus	Cretaceous	herbivore	A hadrosaur.
Nanosaurus	Jurassic	herbivore	May include Drinker, Othnielia and Othnielosaurus.
Nanuqsaurus	Cretaceous	carnivore	A small tyrannosaur from polar latitudes.
Nanotyrannus	Cretaceous	carnivore	Possibly a T. rex juvenile
Nasutoceratops	Cretaceous	herbivore	A ceratopsian known for its large nose and cow-like horns.
Nedcolbertia	Cretaceous	carnivore	An ornithomimosaur.
Nedoceratops	Cretaceous	herbivore	Includes "Diceratops". May be a Triceratops individual.
Niobrarasaurus	Cretaceous	herbivore	A nodosaur.
Nodocephalosaurus	Cretaceous	herbivore	An ankylosaur.
Nodosaurus	Cretaceous	herbivore	Type genus of the Nodosauridae.
Nothronychus	Cretaceous	herbivore	North America's most complete known therizinosaur.
Ojoceratops	Cretaceous	herbivore	May belong to either Triceratops or Eotriceratops.
Ojoraptorsaurus	Cretaceous	omnivore	An oviraptorosaur.
Oohkotokia	Cretaceous	herbivore	An ankylosaur of uncertain relationships.
Orcomimus	Cretaceous	omnivore	Reportedly an ornithomimosaur.
Ornitholestes	Jurassic	carnivore	A basal coelurosaur.
Ornithomimus	Cretaceous	omnivore	Type genus of the Ornithomimosauria.
Orodromeus	Cretaceous	herbivore	A neornithischian.
Oryctodromeus	Cretaceous	herbivore	Possibly a burrower.
Osmakasaurus	Cretaceous	herbivore	An iguanodont.
Othnielia	Jurassic	herbivore	Named after scientist Othniel Charles Marsh.
Othnielosaurus	Jurassic	herbivore	Most Othnielia remains have been transferred to this animal.
Pachycephalosaurus	Cretaceous	herbivore	Has a dome on the top of its head.
Pachyrhinosaurus	Cretaceous	herbivore	Three species are known that have different head shapes.
Palaeopteryx	Jurassic	insectivore	Dubious, see article
Palaeoscincus	Cretaceous	herbivore	Dubious, see article
Panoplosaurus	Cretaceous	herbivore	A nodosaur.
Parasaurolophus	Cretaceous	herbivore	A hadrosaur known for its large, long, tube-like crest.
Parksosaurus	Cretaceous	herbivore	A neornithischian.
Paronychodon	Cretaceous	carnivore	A tooth taxon.
Pawpawsaurus	Cretaceous	herbivore	A nodosaur.
Peloroplites	Cretaceous	herbivore	A large nodosaur.
Pectinodon	Cretaceous	carnivore	A possibly dubious tooth taxon.
Pentaceratops	Cretaceous	herbivore	Despite its name, it only has three horns.
Planicoxa	Cretaceous	herbivore	An iguanodont.
Plateosaurus	Trassic	herbivore	An prosauropod.
Podokesaurus	Jurassic	carnivore	Highly dubious; may be the same as Coelophysis.
Polyonax	Cretaceous	herbivore	Possibly a ceratopsian.
Prenoceratops	Cretaceous	herbivore	A basal ceratopsian.
Priconodon	Cretaceous	herbivore	A nodosaur.
Propanoplosaurus	Cretaceous	herbivore	Known from the imprints of a skeleton, not actual fossilized bones.
Prosaurolophus	Cretaceous	herbivore	A large saurolophine hadrosaur.
Protoavis	Triassic	carnivore	Dubious, see article
Protohadros	Cretaceous	herbivore	Actually a non-hadrosaur iguanodont.
Pteropelyx	Cretaceous	herbivore	A dubious hadrosaur.
Richardoestesia	Cretaceous	carnivore	Similar-looking teeth have been found in South America, Europe, and Asia.
Rubeosaurus	Cretaceous	herbivore	May be the same as Styracosaurus, and Brachyceratops may represent its juveniles.
Sarahsaurus	Jurassic	herbivore	Once thought to represent American specimens of Massospondylus.
Saurolophus	Cretaceous	herbivore	A species is also found in Mongolia.
Sauropelta	Cretaceous	herbivore	A nodosaur with a long tail.
Saurophaganax	Jurassic	carnivore	Possibly the top land predator of the Late Jurassic
Sauroposeidon	Cretaceous	herbivore	Possibly the tallest known dinosaur.
Saurornitholestes	Cretaceous	carnivore	A dromaeosaur.
Scolosaurus	Cretaceous	herbivore	An ankylosaur with a convoluted taxonomic history.
Scutellosaurus	Jurassic	herbivore	A basal, bipedal thyreophoran.
Segisaurus	Jurassic	carnivore	A coelophysoid.
Seitaad	Jurassic	herbivore	A sauropodomorph whose holotype specimen may have died during the collapse of a sand dune.
Siats	Cretaceous	carnivore	The largest carnivorous dinosaur in North America before the appearance of T. rex.
Silvisaurus	Cretaceous	herbivore	A relatively obscure nodosaur.
Sonorasaurus	Cretaceous	herbivore	State dinosaur of Arizona.
Sphaerotholus	Cretaceous	herbivore	A pachycephalosaur.
Spinops	Cretaceous	herbivore	Its holotype specimen was once said as being "nothing but rubbish".
Stegoceras	Cretaceous	herbivore	Not to be confused with Stegosaurus.
Stegopelta	Cretaceous	herbivore	An ankylosaur.
Stegosaurus	Jurassic	herbivore	Well known for the plates and spikes on its back.
Stenonychosaurus	Cretaceous	carnivore	Most Troodon remains were transferred to this genus.
Stephanosaurus	Cretaceous	herbivore	May be the same as Lambeosaurus.
Stokesosaurus	Jurassic	carnivore	A tyrannosauroid.
Struthiomimus	Cretaceous	omnivore	An ornithomimosaur.
Stygimoloch	Cretaceous	herbivore	May be a subadult Pachycephalosaurus.
Styracosaurus	Cretaceous	herbivore	Known for the spikes that surrounded its frill.
Supersaurus	Jurassic	herbivore	A very large dinosaur.
Suskityrannus	Cretaceous	carnivore	Formerly nicknamed "Zunityrannus".
Suuwassea	Jurassic	herbivore	The first known North American dicraeosaurid.
Talos	Cretaceous	carnivore	Named for a bronze automaton in Greek mythology.
Tanycolagreus	Jurassic	carnivore	Possibly a tyrannosauroid.
Tatankacephalus	Cretaceous	herbivore	An ankylosaur.
Tatankaceratops	Cretaceous	herbivore	Possibly a juvenile Triceratops.
Tawa	Triassic	carnivore	A very primitive dinosaur.
Tenontosaurus	Cretaceous	herbivore	An iguanodont with a very long tail.
Teratophoneus	Cretaceous	carnivore	A tyrannosaur.
Texacephale	Cretaceous	herbivore	Unusual structures on its head have been compared to gears.
Texasetes	Cretaceous	herbivore	A nodosaur.
Theiophytalia	Cretaceous	herbivore	A skull of Camptosaurus has been referred to this genus.
Thescelosaurus	Cretaceous	herbivore	One specimen was once thought to have preserved its heart.
Thespesius	Cretaceous	herbivore	A hadrosaur.
Tichosteus	Jurassic	herbivore	Probably an ornithopod.
Titanoceratops	Cretaceous	herbivore	It has one of the largest skulls of any known animal.
Torosaurus	Cretaceous	herbivore	Once thought to have been an adult Triceratops.
Torvosaurus	Jurassic	carnivore	A large theropod.
Trachodon	Cretaceous	herbivore	Dubious, see article
Triceratops	Cretaceous	herbivore	Known for the three horns and the frill on its head.
Troodon	Cretaceous	carnivore	Formerly included Stenonychosaurus and Polyodontosaurus.
Tyrannosaurus	Cretaceous	carnivore	The most well-known non-avian dinosaur.
Unescoceratops	Cretaceous	herbivore	A leptoceratopsid.
Utahceratops	Cretaceous	herbivore	A ceratopsid.
Utahraptor	Cretaceous	carnivore	The largest known dromaeosaur.
Uteodon	Jurassic	herbivore	Formerly assigned to Camptosaurus.
Vagaceratops	Cretaceous	herbivore	A chasmosaurine ceratopsian.
Velafrons	Cretaceous	herbivore	A hadrosaur from Mexico.
Venenosaurus	Cretaceous	herbivore	A sauropod.
Xenoceratops	Cretaceous	herbivore	A centrosaurine ceratopsid.
Yurgovuchia	Cretaceous	carnivore	A dromaeosaur.
Zapsalis	Cretaceous	carnivore	A tooth taxon that may represent a dromaeosaur.
Zephyrosaurus	Cretaceous	herbivore	A neornithischian.
Ziapelta	Cretaceous	herbivore	Named after the Zia sun symbol on the flag of New Mexico.
Zuniceratops	Cretaceous	herbivore	One of the oldest ceratopsians with horns.
Zuul	Cretaceous	herbivore	Named after Zuul from the film Ghostbusters.

Timeline

This is a timeline of selected dinosaurs from the list above. Time is measured in Ma, megaannum, along the x-axis.

See also

• List of North American birds

References

1. "CGS Interactive Field Trips". www.ncgeology.com. Retrieved 2016-04-13.
2. LUCAS, S. G., 2014: Vertebrate paleontology in Central America: 30 years of progress.- Rev. Geol. Amér. Central, Número
3. Horne, Gregory S., M. G. Atwood, and Allen P. King. 1974. "Stratigraphy, Sedimentology, and Paleoenvironment of Esquias Formation of Honduras." AAPG Bulletin 58 (2): 176–88.
4. Horne, Gregory S. 1994. "A Mid-Cretaceous Ornithopod from Central Honduras." Journal of Vertebrate Paleontology 14 (1): 147–50
5. "The Norwalk Hour - Búsqueda en el archivo de Google Noticias".
6. "Archived copy". Archived from the original on 2016-03-10. Retrieved 2016-03-09.CS1 maint: archived copy as title (link)
7. Diet is sometimes hard to determine for dinosaurs and should be considered a "best guess"