A “branched-tooth (or broken) lizard” from Late Cretaceous southern Argentina. The name, klao, “break” is probably named for the broken-up way the type specimen was collected; that is, pieces were recovered at different times years apart. Another source [http://www.enchantedlearning.com/subjects/dinosaurs/glossary/indexc.shtml] says that its “headless fossilized skeleton was found in Kansas, USA.” Named by Othniel Charles Marsh (1831-1899) in 1890.