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. This may not mean the dinosaurs were more diverse or abundant; it may be because substantial resources have been devoted to the North American fossil record.

The Middle Jurassic is the only poorly represented time period in North America, although several Middle Jurassic  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.  

During the Early Cretaceous period, new, various types of dinosaurs appeared. Sauropods like *Cedarosaurus* were still present, but they were not as diverse as they were in the Jurassic. Theropods from the early Cretaceous of North America include *Deinonychus,* *Utahraptor*, *Acrocanthosaurus*, and a new genus of theropod, *Microvenator*. Huge plant-eating, long-necked dinosaurs included *Astrodon* and the Late Cretaceous sauropod *Sauroposeidon*. Ornithischians were more diverse than they were in the Jurassic Period. *Tenontosaurus*, *Hypsilophodon*, *Iguanodon*, *Protohadros*, and *Eolambia* are some of the ornithopods that lived then during the Early Cretaceous. Ankylosaurs replaced their stegosaur cousins in the Cretaceous. Ankylosaurs from the Early Cretaceous timeline of North America include *Sauropelta* and the popular *Gastonia*. Therizinosaurs such as *Falcarius,* are also known from the Early Cretaceous rocks of North America.

Finally, in the long Late Cretaceous, 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 (83.672 mya), an enormous diversity of dinosaurs is known from the Horseshoe Canyon Formation. Theropods from this formation included the tyrannosaurs such as *Albertosaurus*, *Gorgosaurus*, *Daspletosaurus*, *Appalachiosaurus*, and *Dryptosaurus*, as well as the dromaeosaurids *Dromaeosaurus*, *Saurornitholestes*, *Atrociraptor*, and *Bambiraptor*. Ceratopsians, such as *Pachyrhinosaurus*, *Styracosaurus*, *Centrosaurus*, *Monoclonius*, *Brachyceratops*, *Pentaceratops*, and *Leptoceratops* existed in the Horseshoe Canyon Formation at that time. Among hadrosaurs, *Parasaurolophus*, *Corythosaurus*, *Lambeosaurus*, *Saurolophus*, and *Prosaurolophus* existed also during this time. 

During the Late Cretaceous, the Maastrichtian stage (7265.5 mya), in the Hell Creek Formation, the diversity of dinosaurs wasn't as great as the preceding Campanian stage. North American herbivorous dinosaurs from this formation included *Alamosaurus,* *Triceratops,* *Torosaurus*, *Pachycephalosaurus,* *Stegoceras*, *Edmontosaurus,* *Anatosaurus, Pentaceratops,* and *Regaliceratops*. Predatory dinosaurs from this formation included *Tyrannosaurus, Nanotyrannus*, *Troodon*, *Dakotaraptor* and a possible American species of *Spinosaurus*.
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## Key
## Timeline
This is a timeline of selected dinosaurs from the list above.  Time is measured in Ma, megaannum, along the x-axis.

ImageSize  = width:800px height:auto barincrement:15px
PlotArea   = left:10px bottom:50px top:10px right:10px

Period      = from:-250 till:-25
TimeAxis    = orientation:horizontal
ScaleMajor  = unit:year increment:25 start:-250
ScaleMinor  = unit:year increment:5 start:-250
TimeAxis    = orientation:hor
AlignBars   = justify

Colors =
 #legends
  id:CAR	  value:claret
  id:HER	  value:teal
  id:OMN	  value:blue
  id:black        value:black
  id:white        value:white
  id:cretaceous   value:rgb(0.3,0.75,0.1)
  id:jurassic     value:rgb(0.3,0.75,0.4) 
  id:triassic     value:rgb(0.3,0.75,0.7) 
  id:mesozoic     value:rgb(0.3,0.6,0.4)
 
BarData=
 bar:eratop
 bar:space
 bar:periodtop
 bar:space
 bar:NAM1
 bar:NAM2
 bar:NAM3
 bar:NAM4
 bar:NAM5
 bar:NAM6
 bar:NAM7
 bar:NAM8
 bar:NAM9
 bar:NAM10
 bar:NAM11
 bar:NAM12
 bar:NAM13
 bar:NAM14
 bar:NAM15
 bar:NAM16
 bar:NAM17
 bar:NAM18
 bar:NAM19
 bar:NAM20
 bar:NAM21
 bar:NAM22
 bar:NAM23
 bar:NAM24
 bar:NAM25
 bar:NAM26
 bar:NAM27
 bar:NAM28
 bar:NAM29
 bar:NAM30
 bar:NAM31
 bar:NAM32
 bar:NAM33
 bar:NAM34
 bar:NAM35
 bar:NAM36
 bar:NAM37
 bar:NAM38
 bar:NAM39
 bar:NAM40
 bar:NAM41
 bar:NAM42
 bar:NAM43
 bar:NAM44
 bar:NAM45
 bar:NAM46
 bar:NAM47
 bar:NAM48
 bar:NAM49
 bar:NAM50
 bar:NAM51
 bar:NAM52
 bar:NAM53
 bar:NAM54
 bar:NAM55
 bar:NAM56
 bar:NAM57
 bar:NAM58
 bar:NAM59
 bar:space
 bar:period
 bar:space
 bar:era 

PlotData=
 align:center textcolor:black fontsize:M mark:(line,black) width:25 
 shift:(7,-4)
  
 bar:periodtop
 from: -145    till:  -65    color:cretaceous  text:Cretaceous             
 from: -200    till: -145    color:jurassic    text:Jurassic
 from: -250    till: -200    color:triassic    text:Triassic

 bar:eratop
 from:  -250   till:  -65    color:mesozoic    text:Mesozoic 

PlotData=
 align:left fontsize:M mark:(line,white) width:5 anchor:till align:left

 color:CAR bar:NAM1  from:-125  till:-100 text:Acrocanthosaurus
 color:HER bar:NAM2  from:-70   till:-65  text:Alamosaurus
 color:CAR bar:NAM3  from:-74   till:-69  text:Albertosaurus
 color:CAR bar:NAM4  from:-155  till:-145 text:Allosaurus
 color:HER bar:NAM5  from:-68   till:-65  text:Anatotitan
 color:HER bar:NAM6  from:-78   till:-70  text:Anchiceratops
 color:HER bar:NAM7  from:-70   till:-65  text:Ankylosaurus
 color:HER bar:NAM8  from:-155  till:-145 text:Apatosaurus
 color:HER bar:NAM9  from:-155  till:-145 text:Barosaurus
 color:HER bar:NAM10 from:-150  till:-145 text:Brachiosaurus
 color:HER bar:NAM11 from:-76   till:-72  text:Brachyceratops
 color:HER bar:NAM12 from:-77   till:-73  text:Brachylophosaurus
 color:HER bar:NAM13 from:-155  till:-145 text:Camarasaurus
 color:HER bar:NAM14 from:-155  till:-150 text:Camptosaurus
 color:HER bar:NAM15 from:-77   till:-73  text:Centrosaurus
 color:CAR bar:NAM16 from:-155  till:-145 text:Ceratosaurus
 color:CAR bar:NAM17 from:-215  till:-210 text:Coelophysis
 color:HER bar:NAM18 from:-77   till:-73  text:Corythosaurus
 color:CAR bar:NAM19 from:-125  till:-100 text:Deinonychus
 color:HER bar:NAM20 from:-152  till:-147 text:Diplodocus
 color:HER bar:NAM21 from:-155  till:-145 text:Dryosaurus
 color:HER bar:NAM22 from:-70   till:-65  text:Edmontonia
 color:HER bar:NAM23 from:-73   till:-65  text:Edmontosaurus
 color:HER bar:NAM24 from:-155  till:-150 text:Eobrontosaurus
 color:HER bar:NAM25 from:-70   till:-65  text:Eotriceratops
 color:OMN bar:NAM26 from:-130  till:-125 text:Falcarius
 color:CAR bar:NAM27 from:-77   till:-74  text:Gorgosaurus
 color:HER bar:NAM28 from:-83   till:-75  text:Gryposaurus
 color:HER bar:NAM29 from:-156  till:-144 text:Haplocanthosaurus
 color:HER bar:NAM30 from:-76   till:-68  text:Hypacrosaurus
 color:HER bar:NAM31 from:-75   till:-71  text:Kritosaurus
 color:HER bar:NAM32 from:-77   till:-74  text:Lambeosaurus
 color:HER bar:NAM33 from:-70   till:-65  text:Leptoceratops
 color:CAR bar:NAM34 from:-200  till:-194 text:Megapnosaurus
 color:HER bar:NAM35 from:-83   till:-70  text:Monoclonius
 color:HER bar:NAM36 from:-70   till:-68  text:Montanoceratops
 color:HER bar:NAM37 from:-87   till:-82  text:Niobrarasaurus
 color:CAR bar:NAM38 from:-150  till:-145 text:Ornitholestes
 color:HER bar:NAM39 from:-76   till:-68  text:Ornithomimus
 color:HER bar:NAM40 from:-70   till:-65  text:Pachycephalosaurus
 color:HER bar:NAM41 from:-76   till:-73  text:Parasaurolophus
 color:HER bar:NAM42 from:-75   till:-73  text:Pentaceratops
 color:HER bar:NAM43 from:-72   till:-68  text:Saurolophus
 color:CAR bar:NAM44 from:-155  till:-145 text:Saurophaganax
 color:HER bar:NAM45 from:-112  till:-108 text:Sauroposeidon
 color:HER bar:NAM46 from:-200  till:-196 text:Scutellosaurus
 color:HER bar:NAM47 from:-83   till:-65  text:Stegoceras
 color:HER bar:NAM48 from:-150  till:-145 text:Stegosaurus
 color:OMN bar:NAM49 from:-77   till:-70  text:Struthiomimus
 color:HER bar:NAM50 from:-77   till:-75  text:Styracosaurus
 color:HER bar:NAM51 from:-125  till:-105 text:Tenontosaurus
 color:HER bar:NAM52 from:-66   till:-65  text:Thescelosaurus
 color:HER bar:NAM53 from:-68   till:-65  text:Torosaurus
 color:CAR bar:NAM54 from:-150  till:-145 text:Torvosaurus
 color:HER bar:NAM55 from:-68   till:-65  text:Triceratops
 color:CAR bar:NAM56 from:-69   till:-65  text:Tyrannosaurus
 color:CAR bar:NAM57 from:-132  till:-119 text:Utahraptor
 color:HER bar:NAM58 from:-75   till:-71  text:Velafrons
 color:HER bar:NAM59 from:-93   till:-89  text:Zuniceratops

PlotData=
 align:center textcolor:black fontsize:M mark:(line,black) width:25 
  
 bar:period
 from: -145    till:  -65    color:cretaceous  text:Cretaceous             
 from: -200    till: -145    color:jurassic    text:Jurassic
 from: -250    till: -200    color:triassic    text:Triassic

 bar:era
 from:  -250   till:  -65    color:mesozoic    text:Mesozoic 

## Criteria for inclusion
*The creature must appear on the List of dinosaurs.
*Fossils of the creature must have been found in North America.
*This list is a complement to :Category:Dinosaurs of North America.

## Notes