suborder ornithopoda
A paleontologist carefully examines a fossilized suborder ornithopoda skeleton.
Noun: A suborder within the order Ornithischia, comprising a widespread group of herbivorous, bipedal or facultatively bipedal dinosaurs. This group is characterized by their "bird-hipped" pelvic structure and includes duck-billed dinosaurs (hadrosaurs) and their earlier relatives such as iguanodonts. They were dominant herbivores during the Cretaceous period.
The term is used in scientific classification (taxonomy) within paleontology to categorize a specific clade of dinosaurs. - The suborder Ornithopoda includes some of the most successful and diverse plant-eating dinosaurs. - Fossils classified within the suborder Ornithopoda often show complex dental batteries for grinding vegetation.
- Phylogenetic Context: In modern cladistics, Ornithopoda is often defined as a clade (a group consisting of an ancestor and all its descendants) rather than strictly a Linnaean suborder. It is part of the larger group Cerapoda.
- Morphological Definition: The group is defined by shared derived characteristics, such as a predentary bone at the front of the lower jaw and asymmetrical enamel distribution on the teeth.
- Ornithopod (noun): A member of the suborder Ornithopoda.
- The iguanodon was a large ornithopod.
- Ornithischian (noun/adjective): Referring to the larger order ("bird-hipped" dinosaurs) that includes Ornithopoda.
- Stegosaurs and ornithopods are both ornithischian dinosaurs.
- Euornithopoda (a more specific, often synonymous clade within broader definitions of Ornithopoda).
- Bird-footed dinosaurs (a historical, descriptive name, less precise and not commonly used in modern technical literature).
- Hadrosauridae: A family within Ornithopoda, the duck-billed dinosaurs.
- Iguanodontia: A infraorder or clade within Ornithopoda containing iguanodonts and hadrosaurs.
- Cerapoda: The larger clade containing Ornithopoda along with Marginocephalia (like Triceratops).
A paleontologist carefully examines a fossilized suborder ornithopoda skeleton.
- widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon)