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| Caudal vertebrae of D. carnegii showing the double-beamed chevron bones that the genus name refers to, Natural History Museum, London. |
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| D. longus skull from Bone-Cabin Quarry |
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| Caudal vertebrae of D. carnegii showing the double-beamed chevron bones that the genus name refers to, Natural History Museum, London. |
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| D. longus skull from Bone-Cabin Quarry |