sauro-, saur-, -saurus, -saurid, -saur,
-sauria, -saurian +

(Greek: lizard, reptile, serpent; used especially with reference to "dinosaurs")

Oligosaurus
This nomenclature (“small lizard”) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Mochlodon or Rabdodon. Named by Harry Govier Seeley in 1881.
Omeisaurus
An “Omei (Mount Emei) lizard” from Late Jurassic China. The Chinese Omei, “lofty” plus mei, “brow”; the name of a sacred mountain, Omeishan, some 100 kilometers west of Yunghsien in Sichuan Province, China. Named by Chinese paleontologist Yang Zhong-jian (also known as: Chung Chien Young) in 1939.
Omosaurus
This nomenclature (“forelimb lizard”) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Dacentrurus. Named by British anatomist Sir Richard Owen, 1875/Joseph Leidy, 1856.
Onychosaurus
This nomenclature (“barbed lizard” [Greek onykh- (onyx), “claw, nail, barb”]) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Struthiosaurus or Rabdodon. Named by Franz Baron Nopcsa in 1902.
Ophthalmosauria
An Ichthyosaur from Late Jurassic England, France, Argentina, and western North America. It was not a dinosaur but another type of extinct reptile.
Oplosaurus
This nomenclature (“armored lizard”) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Pelorosaurus. Named by François Louis Paul Gervais in 1852.
Orinosaurus
This nomenclature (“mountain lizard”) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Euskelosaurus. Named by British paleontologist Richard Lydekker in 1889.
Ornithosaria
These “bird lizard” had this name proposed by an Italian ornithologist to indicate that pterosaurs had an anatomical organization between that of birds and reptiles.
Oronosaurus
A “Oron lizard” from Late Cretaceous Be’er Sheva, Negev Desert. Named by Per Christiansen (Zoological Museum, Copenhagen, Denmark) and Niels Bonde (Geological Institute, Copenhagen, Denmark), 1999 (?).
Orophosaurus
A “roofed lizard” from Late Cretaceous North America. Named by Edward Drinker Cope (1840-1897) in 1887.
Orosaurus
This nomenclature (“mountain lizard”) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Euskelosaurus.
Orthogoniosaurus
A “straight-angled lizard” found in Late Cretaceous rocks in India. It was named for a tooth with a straight, serrated distal margin and a curved unserrated mesial margin. Named by Indian paleontologist H. C. Das-Gupta in 1931.
Oshanosaurus
An Early Jurassic dinosaur that is believed to have existed in what is now China. It was named by Chinese paleontologist Zijin Zhao in 1986.
Ouranosaurus
A “brave (fearless, valiant) lizard” from Early Cretaceous Sahara Desert of Niger, North Africa. The term ourane in Niger dialect means “fearless or valiant”. From a name used for the desert monitor (Varanus griseus) by the Tuareg tribe of Niger. The fossils were found in the Gadoufaouna deposits, southwest of Elrahz. Named by Philippe Taquet in 1976.
Pachycephalosaurids
These “boneheads” were strange bipeds with thick skulls. These might have served as crash-helmets to protect the brain when rival males banged heads.

A cross reference of other word family units that are related directly, or indirectly, with: "snakes or other reptiles": angui-; coluber-; herpeto-; ophio-; reptil-.