What two types of skeletal elements constitute the limited known type specimens of *Xenotarsosaurus*?
Answer
Two anterior dorsal vertebrae and a remarkably complete right hind limb
Knowledge of *Xenotarsosaurus* is severely restricted because its fossil evidence consists only of the two initial type specimens discovered by Juan Carlos Sciutto. These limited remains are specifically documented as comprising two anterior dorsal vertebrae, which are bones from the upper back region. Crucially, they also include a remarkably complete right hind limb. The absence of cranial bones prevents detailed study of its skull shape or dentition, meaning all major inferences about its anatomy must be drawn from these limited post-cranial elements.
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