saurischia
Definition
Noun 1. A major order of dinosaurs: Saurischia is one of the two primary divisions of dinosaurs, characterized by a pelvic structure where the pubis bone points forward. This order includes both carnivorous theropods (like Tyrannosaurus) and herbivorous sauropods (like Brachiosaurus).
Usage Examples
- Noun:
- The fossil record clearly distinguishes between the two main groups of dinosaurs: Saurischia and Ornithischia.
- All known carnivorous dinosaurs, such as velociraptors, belong to the order Saurischia.
- The massive, long-necked sauropods are a subgroup within Saurischia.
Advanced Usage
- In taxonomic context: The term is used in scientific classification to define a clade based on specific hip bone morphology.
- The discovery of the early dinosaur Herrerasaurus helped paleontologists understand the evolution of Saurischia.
Variants and Related Words
- Saurischian (adj/n): Of or belonging to the order Saurischia; a member of this order.
- The saurischian hip structure is considered the ancestral condition for dinosaurs.
Synonyms
- Lizard-hipped dinosaurs: A common descriptive synonym referring to the forward-pointing pubis bone, which resembles the pelvic arrangement of modern lizards.
Related Terms (Contextual)
- Ornithischia: The other major order of dinosaurs, characterized by a "bird-hipped" pelvic structure.
- Theropod: A suborder of mostly carnivorous saurischian dinosaurs.
- Sauropodomorpha: A suborder of herbivorous, often gigantic, saurischian dinosaurs.
Noun
- extinct terrestrial reptiles: theropods (carnivorous); sauropods (herbivorous)
Khám phá thêm
Các từ liên quan
Từ đồng nghĩa
Từ chứa "saurischia"
