What does saurischian mean?
Saurischian is a technical zoological term referring to a major dinosaur group whose name means “lizard-hipped.” Its members are distinguished by the arrangement of the bones of the pelvis, in contrast with ornithischians, or “bird-hipped” dinosaurs. Saurischia includes two principal branches: theropods, a diverse group that includes birds, and sauropods, the long-necked giants that included the largest known land animals. The word is most often used as an adjective, as in “saurischian fossils” or “saurischian anatomy,” but it can also denote an individual member of the group. Because the term is taxonomic rather than everyday, readers will usually encounter it in discussions of dinosaur evolution, fossil classification, and the evolutionary relationship between non-avian dinosaurs and birds.
Of or relating to Saurischia, the dinosaur group characterized by a lizard-like arrangement of the pelvic bones.
"The museum display explains saurischian hip anatomy."
Usually used in specialized paleontology and evolutionary biology.
A dinosaur belonging to Saurischia, including theropods and sauropods.
"The theropod and the long-necked sauropod are both saurischians."
A taxonomic term rather than a customary everyday word.
The plural is used when referring to multiple members of the group or individual fossils assigned to it.
"Paleontologists have identified several saurischians from the same geological formation."
The name means “lizard-hipped”: saurischians are the dinosaur group that gave rise to birds.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does saurischian come from?
The word was formed in the nineteenth century from Greek sauros, meaning “lizard,” and ischion, meaning “hip,” referring to the characteristic shape and arrangement of the pelvic bones. The related name Saurischia uses the same elements in its taxonomic form. Related English words include saurian and sauropod, while ischium retains the Greek element for the hip bone.
How saurischian is actually used
This is primarily a specialized paleontological and taxonomic term. In general writing, “theropod” or “sauropod” is normally preferred when a particular branch is intended.
Easily confused with saurischian
Saurischians had a lizard-like hip arrangement, whereas ornithischians had a bird-like hip arrangement.
A theropod is one major saurischian group, particularly characterized by bipedal posture, hollow bones, and often carnivory.