Ground sloth, Xenarthra, Megalonyx, Turin local fauna, Pleistocene, Monona Co., Iowa
A well-preserved cranium of a large Pleistocene ground sloth (Megalonyx jeffersonii) is described in detail and compared with six other North American Megalonyx crania. Although the morphology of the Iowa specimen compares favorably with all others, the descending flange of the zygomatic arch is unusual in that it is sharply deflected to the posterior. This suggests a more horizontal component to the masseter. Two new and six previous Iowa records of Megalonyx in Iowa are reported or reexamined.
Proceedings of the Iowa Academy of Science
©1983 Iowa Academy of Science, Inc.
McDonald, H. Gregory and Anderson, Duane C.
"A Well-Preserved Ground Sloth (Megalonyx) Cranium from Turin, Monona County, Iowa,"
Proceedings of the Iowa Academy of Science, 90(4), 134-140.
Available at: https://scholarworks.uni.edu/pias/vol90/iss4/6