Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Wangwosaurus is an extinct genus of non-mammalian synapsid.Mammals (formally Mammalia) are a class of vertebrate, air-breathing animals whose females are characterized by the possession of mammary glands while both males and females are characterized by hair and/or fur, three middle ear bones used in hearing, and a neocortex region in the brain. Some mammals have sweat glands, but most do not.

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