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A new look at a fossil mammal with powerful front peg for digging is clearing up questions about the origin of a group of strange and scaly modern - daytime creatures call pangolins .
First excavate in Mongolia in the 1970s , the fogey sat in memory board for decades until researchers for the Russian Academy of Sciences rediscover and analyzed it , reporting their final result today ( Aug. 27 ) in the Journal of Vertebrate Paleontology .
A modern-day pangolin (Manis pentadactyla) skeleton (top) and the ancientErnanodon antelios(bottom).
What they discover was a dog - size of it , strong - shoulder digger called Ernanodon . This mammalian live about 57 million year ago , after dinosaur had died out and our furry ancestors had taken over . Ernanodon was known from one other fossil find inChina , but that specimen is warped , and some archaeologists even thought it might be a fake .
The novel discovery puts those accusations to rest , state bailiwick researcher Peter Kondrashov , an anatomist at Kirksville College of Osteopathic Medicine in Missouri .
" It ’s the genuine deal , " Kondrashov told LiveScience . [ Gallery : Evolution ’s Most Extreme Mammals ]
Ernanodon bones found in Mongolia.
The find also aid put the mysterious Ernanodon into the mammal house tree diagram . archeologist had suspected that the beast might be touch on to modern - mean solar day sloth and armadillo . or else , Kondrashov tell , it is more closely tied to pangolins , which live in the tropic of Asia and Africa . Pangolins are bizarre mammal underwrite in scales . Like ant bear , they have a long , sticky tongue for catch termites and other insects .
Ernanodon likely did the same , Kondrashov suppose . Little is known about thePaleocene environmentin Asia that Ernanodon called place , but alike latitudes in North America were a mixture of forest and open landscape . Ernanodon lacked adaptations for climbing and had only minimal teeth , suggesting that it was a ground - dweller that eat cushy food for thought like insects . Its unattackable claws and powerful shoulders would have aid it dig into formicary and termite hummock .
" It was definitely a terrestrial mammalian . It does n’t have any adaptations for climbing trees , " Kondrashov enounce . " It was just designed to take the air on fair flat surface . "
The Modern Ernanodon is an passing complete skeleton , Kondrashov said , uncommon for Paleocene Asia .
" This is the time when all the primary chemical group of mammals were establish on the planet . This history is really well - trace in North America , and there ’s very little known about Asia , " he say . " This help us to understand how these early step in the evolution of major mathematical group of mammals happen in Asia . "
