The Mad and Terrible Arkansan

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From National Geographic:
Ancient Sea Monster Found—First Freshwater Species KnownCrocodile-like predator roamed rivers 84 million years ago, study says.
It’s not quite Nessie, but it’s close. Fossils belonging to an 84-million-year-old freshwater sea monster have been found in Hungary, according to a new study.
The recently unearthed creature belongs to a family of ancient aquatic reptiles known as mosasaurs, which looked like crosses between crocodiles and whales. Mosasaurs lacked the superlong necks found in plesiosaurs, which the legendary inhabitant of Loch Ness is alleged to be.
Dubbed Pannoniasaurus, the creature is the first mosasaur thought to spend its entire life in freshwater.
"The evidence we provide here makes it clear that similar to some lineages of [whales], mosasaurs quickly adapted to a variety of aquatic environments," study leader László Makádi, a paleontologist at the Hungarian Natural History Museum, said in a statement
Full Article
Illustration: A mosasaur swims an ancient river in an artist’s rendering by Tibor PecsicsArticle by Ker Than, National Geographic News; December 19, 2012

From National Geographic:

Ancient Sea Monster Found—First Freshwater Species Known
Crocodile-like predator roamed rivers 84 million years ago, study says.

It’s not quite Nessie, but it’s close. Fossils belonging to an 84-million-year-old freshwater sea monster have been found in Hungary, according to a new study.

The recently unearthed creature belongs to a family of ancient aquatic reptiles known as mosasaurs, which looked like crosses between crocodiles and whales. Mosasaurs lacked the superlong necks found in plesiosaurs, which the legendary inhabitant of Loch Ness is alleged to be.

Dubbed Pannoniasaurus, the creature is the first mosasaur thought to spend its entire life in freshwater.

"The evidence we provide here makes it clear that similar to some lineages of [whales], mosasaurs quickly adapted to a variety of aquatic environments," study leader László Makádi, a paleontologist at the Hungarian Natural History Museum, said in a statement

Full Article

Illustration: A mosasaur swims an ancient river in an artist’s rendering by Tibor Pecsics
Article by Ker Than, National Geographic News; December 19, 2012