Which fossil example is described as an ancient walrus cousin lacking tusks?
Answer
*Pontolis magnus*
*Pontolis magnus* serves as a key example illustrating the evolutionary path before the development of prominent tusks within the Odobenidae family. Fossils of this nature are described as lacking tusks entirely, suggesting that the basic morphology necessary for a walrus-like creature—a body capable of hauling out and navigating water—was established prior to the massive modification of the canines into tusks. The existence of such tuskless forms underscores that the feature defining the modern walrus name ('tooth-walkers') is a later specialization, not an initial requirement for membership in the early walrus stem lineage.
#Videos
The Evolution of Seals, Sea Lions, and Walruses - YouTube
How the Walrus Got Its Tusks - YouTube
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