Xenosaur
Scientists don't always agree. Consider the case of the mysterious xenosaurs, an unusual family of reptiles whose name means "strange lizard." They're not strange because they act funny, but because zoologists don't know very much about them. And because there's not a lot of information on these animals, scientists who study reptiles--otherwise known as herpetologists--are busy debating exactly which lizards should be included in the xenosaur family.
Three of the four species of xenosaurs live in Central America and Mexico. Commonly known as bark lizards, they hang out in holes in trees and hollow logs. They've got triangle-shaped heads, short, skinny tails and flat, fat bodies. The fourth species, the Chinese Crocodile lizard, is very similar anatomically, but has a square head and a thicker tail that looks like it belongs on a majorly mini crocodile. Because of these and other differences, some scientists say he isn't a true xenosaur--and should be in a class by himself!
Is it a mystery--or just mistaken identity? We'll let you know if this case is ever solved!