Dinosauria (Dinosaurs And Birds) is a group of vertebrates. There are 13010 species of dinosaurs and birds, in 3829 genera and 458 families. This group has been around since the middle triassic epoch.
Definition: Component found in mineralized skeletal tissue, (a specialized form of biogenic tissue in which the extracellular matrix is mineralized, and which functions in mechanical and structural support.)
Definition: The number of fossil occurrences in the Paleobiology Database (https://paleobiodb.org) that are identified as belonging to a particular taxon or any of its subtaxa.