Which specific North American location is mentioned for yielding important Xenacanthus specimens during the Permian period?
Answer
Texas
Fossil discoveries critical to mapping the geographical range of *Xenacanthus* during the Permian period have been made in areas now comprising North America, with specific mention of specimens originating from locations within Texas. Fossil beds in this region have provided researchers with important articulated skeletons and characteristic elements like teeth, allowing for detailed reconstructions of the creature's proportions and distribution during that time frame.
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