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[]

Key

Nomen dubium

Invalid

Nomen nudum

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