Paleo Profile: Kimbetopsalis simmonsae

Name: Kimbetopsalis simmonsae

Meaning: "Simmon's cutting shears of Kimbeto Wash" in recognition of mammal paleontologist Nancy Simmons, the place where the fossils were found, and the snipping front teeth of the beast.

Age: Around 64.5 million years old.

Where in the world?: The San Juan Basin of northern New Mexico.

What sort of critter?: One of the multituberculates, a superficially rodent-like and long-lived group of extinct mammals.

Size: Estimated at around three feet long and over 22 pounds.

How much of the creature’s body is known?: A partial skull and elements of the upper jaws, including teeth still in their sockets.

Claim to fame: Multituberculates were one of evolution's greatest success stories. That may ...

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