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Iguanodonts were herbivorous dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
s that lived from the mid-Jurassic
Jurassic

The Jurassic is a geologic period that extends from about annum to  Ma, that is, from the end of the Triassic to the beginning of the Cretaceous....
 to Late Cretaceous
Late Cretaceous

Late Cretaceous refers to the second half of the Cretaceous Period , named after the famous white chalk cliffs of southern England, which date from this time....
. Some members include Camptosaurus
Camptosaurus

Camptosaurus is a genus of plant-eating, beaked dinosaurs of the Late Jurassic and Early Cretaceous Period . The name means 'bent lizard', because, when standing on all fours, its body must have been arched ....
, Callovosaurus
Callovosaurus

Callovosaurus is a primitive Iguanodont dinosaur from the mid-Jurassic period in England. The diet of Callovosaurus, like that of other Iguanodonts, was plant material....
, Iguanodon
Iguanodon

Iguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedalism hypsilophodontids and the ornithopods' culmination in the hadrosaurid dinosaurs....
, and Ouranosaurus
Ouranosaurus

Ouranosaurus was an unusual iguanodont that lived during the early Cretaceous about 110 mya in what is now Africa. Ouranosaurus measured about 7 metre long and weighed about 4 tons....
. Iguanodonts were one of the first groups of dinosaurs to be found. They are among the best known of the dinosaurs, and include the "duck-billed" hadrosaurs. Iguanodontians were fairly large animals, and some (such as Shantungosaurus
Shantungosaurus

Shantungosaurus, meaning "Shandong Lizard", is a genus of flat headed hadrosaurid dinosaurs found in the Late Cretaceous Wangshi Formation of the Shandong Peninsula in China....
, which measured up to 50 ft (15 m) in length and weighed up to 8 tons) approached the largest carnivorous dinosaurs in size.

nodontia is often listed as an infraorder within a suborder Ornithopoda, though Benton (2004) lists Ornithopoda as an infraorder and does not rank Iguanodontia.






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Iguanodonts were herbivorous dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
s that lived from the mid-Jurassic
Jurassic

The Jurassic is a geologic period that extends from about annum to  Ma, that is, from the end of the Triassic to the beginning of the Cretaceous....
 to Late Cretaceous
Late Cretaceous

Late Cretaceous refers to the second half of the Cretaceous Period , named after the famous white chalk cliffs of southern England, which date from this time....
. Some members include Camptosaurus
Camptosaurus

Camptosaurus is a genus of plant-eating, beaked dinosaurs of the Late Jurassic and Early Cretaceous Period . The name means 'bent lizard', because, when standing on all fours, its body must have been arched ....
, Callovosaurus
Callovosaurus

Callovosaurus is a primitive Iguanodont dinosaur from the mid-Jurassic period in England. The diet of Callovosaurus, like that of other Iguanodonts, was plant material....
, Iguanodon
Iguanodon

Iguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedalism hypsilophodontids and the ornithopods' culmination in the hadrosaurid dinosaurs....
, and Ouranosaurus
Ouranosaurus

Ouranosaurus was an unusual iguanodont that lived during the early Cretaceous about 110 mya in what is now Africa. Ouranosaurus measured about 7 metre long and weighed about 4 tons....
. Iguanodonts were one of the first groups of dinosaurs to be found. They are among the best known of the dinosaurs, and include the "duck-billed" hadrosaurs. Iguanodontians were fairly large animals, and some (such as Shantungosaurus
Shantungosaurus

Shantungosaurus, meaning "Shandong Lizard", is a genus of flat headed hadrosaurid dinosaurs found in the Late Cretaceous Wangshi Formation of the Shandong Peninsula in China....
, which measured up to 50 ft (15 m) in length and weighed up to 8 tons) approached the largest carnivorous dinosaurs in size.

Systematics

Iguanodontia is often listed as an infraorder within a suborder Ornithopoda, though Benton (2004) lists Ornithopoda as an infraorder and does not rank Iguanodontia. Traditionally, iguanodonts were grouped into the superfamily Iguanodontoidea and family Iguanodontidae. However, phylogenetic studies show that the traditional "iguanodontids" are a paraphyletic grade leading up to the hadrosaurs
Hadrosaurid

Hadrosaurids or duck-billed dinosaurs are members of the family Hadrosauridae, and include ornithopods such as Edmontosaurus and Parasaurolophus....
 (duck-billed dinosaurs). Groups like Iguanodontoidea are still used as unranked clade
Clade

A clade is a term used in modern alpha taxonomy, the scientific classification of living and fossil organisms, to describe a monophyletic group, defined as a group consisting of a single common ancestor and all its descendants.The term "monophyletic group" is used in this article in the conventional sense of "an a...
s in the scientific literature, though many traditional "iguanodontids" are now included in the superfamily Hadrosauroidea
Hadrosauroidea

Hadrosauroidea is a clade or superfamily of ornithischian dinosaurs that includes the "duck-billed" dinosaurs, or hadrosaurids, and their close relatives....
.

Taxonomy

  • Parvorder Iguanodontia
    • Anabisetia
      Anabisetia

      Anabisetia is a genus of ornithopod dinosaur from the Late Cretaceous Period of Patagonia, South America. It was a small bipedal herbivore, almost seven feet long....
    • Bihariosaurus
      Bihariosaurus

      Bihariosaurus was a genus of camptosaurid dinosaur from Late Cretaceous Romania. The type species, Bihariosaurus bauxiticus, was described by Marinescu in 1989....
      ** Macrogryphosaurus
      Macrogryphosaurus

      Macrogryphosaurus is a genus of Basal iguanodont dinosaur from the Turonian-early Coniacian age Upper Cretaceous Portezuelo Formation of Patagonia, Argentina....
    • Muttaburrasaurus
      Muttaburrasaurus

      Muttaburrasaurus is a genus of herbivorous ornithopod dinosaur related to Camptosaurus and Iguanodon, from what is now northeastern Australia between 100 and 98 million years ago during the early Cretaceous Period ....
    • Talenkauen
      Talenkauen

      Talenkauen is a genus of Basal iguanodont dinosaur from the Maastrichtian-age Upper Cretaceous Pari Aike Formation of Lake Viedma, Santa Cruz Province , Argentina....
    • Tenontosaurus
      Tenontosaurus

      Tenontosaurus is a genus of medium- to large-sized ornithopod dinosaur. It was formerly thought to be a 'hypsilophodont', but since Hypsilophodontia is no longer considered a clade, it is now considered to be a very primitive iguanodont....
    • Family Dryosauridae
      • ?Callovosaurus
        Callovosaurus

        Callovosaurus is a primitive Iguanodont dinosaur from the mid-Jurassic period in England. The diet of Callovosaurus, like that of other Iguanodonts, was plant material....
      • Dryosaurus
        Dryosaurus

        Dryosaurus meaning 'oak lizard', due to the vague oak shape of its cheek teeth was a genus of an ornithopod dinosaur that lived in the Late Jurassic Period....
      • Valdosaurus
        Valdosaurus

        Valdosaurus is a genus of small, bipedal herbivorous ornithopod dinosaur found on the Isle of Wight, elsewhere in Europe, and Africa. It lived during the Early Cretaceous....
    • Family Rhabdodontidae
      Rhabdodontidae

      Rhabdodontids were herbivorous ornithopod dinosaurs from the Late Cretaceous Period. Rhabdodontids were similar to large, robust hypsilophodonts, with deep skulls and jaws....
      • ?Mochlodon
        Mochlodon

        Mochlodon is a genus of iguanodont dinosaur from the Late Cretaceous. It was at first believed to be a species of Iguanodon, but was later placed in Rhabdodon....
      • Rhabdodon
        Rhabdodon

        Rhabdodon is a genus of dinosaur that lived in Europe approximately 70 million years ago in the Late Cretaceous. It is unclear whether it was an iguanodont or a hypsilophodont, and may be a "missing link" between the two....
      • Zalmoxes
        Zalmoxes

        'Zalmoxes' was a genus of herbivore dinosaur from the Late Cretaceous. It is classified as a Rhabdodontidae iguanodont. The type species is Z....
    • Family Camptosauridae
      • Camptosaurus
        Camptosaurus

        Camptosaurus is a genus of plant-eating, beaked dinosaurs of the Late Jurassic and Early Cretaceous Period . The name means 'bent lizard', because, when standing on all fours, its body must have been arched ....
      • Cumnoria
      • Draconyx
        Draconyx

        Draconyx is a genus of dinosaur from the Late Jurassic. It was an Ornithopoda which lived in what is now Portugal. It was found in Lourinh?, in 1991, and described by Oct?vio Mateus and Miguel Telles Antunes in 2001....
    • Superfamily Iguanodontoidea*
      • Lurdusaurus
        Lurdusaurus

        Lurdusaurus is a genus of large ornithopod dinosaur which lived in the Aptian faunal stage of the Early Cretaceous, about 121 to 112 million years ago....
      • Lanzhousaurus
        Lanzhousaurus

        Lanzhousaurus is the name given to a genus of dinosaur discovered in 2005. Lanzhousaurus lived in the Gansu region of what is now China during the Early Cretaceous....
      • Mantellisaurus
        Mantellisaurus

        Mantellisaurus is a genus of dinosaur formerly known as Iguanodon atherfieldensis. The new genus was erected by Gregory Paul in 2007. According to Paul, it is more lightly built than Iguanodon and more closely related to Ouranosaurus, making Iguanodon in its traditional sense paraphyletic....
      • Family Iguanodontidae
        • Iguanodon
          Iguanodon

          Iguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedalism hypsilophodontids and the ornithopods' culmination in the hadrosaurid dinosaurs....