Paleobiogeography And Evolutionary History Of Thyreophora

FIGURE 12.9 Tuojiangosaurus, a Late Jurassic stegosaur from China. Temporary display at Fernbank Museum of Natural History, Atlanta, Georgia.

thieves stole them before paleontologists could properly describe them (Chapter 2). In general, stegosaur tracks should be easier to tell apart from most other quadrupedal dinosaur tracks because of their unusual digit combinations - the manus has five toes and the pes has only three toes. However, this digital arrangement may have been the same in a few ankylosaurs, thus warranting some caution when attempting to identify the trackmakers. No gastroliths have been reported yet in association with a stegosaur skeleton, so how stegosaurs processed their food efficiently with such poorly-developed teeth remains a mystery. What they ate is also unknown, as no stegosaur coprolite or former gut contents have been interpreted from the geologic record. Like ankylosaurs, stegosaurs will be better understood when more of their trace fossils are recognized in tandem with their body fossils.

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