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Lions , tigers , bear and even firm puppy and playful jackpot all come from the same line of work of carnivorous mammals , a descent whose origins are lost in clip . Now , scientists have fall upon one of the early ancestors of all modern carnivores in Belgium .
Thenew species , Dormaalocyon latouri , was a 2 - pound ( 1 kilogram ) tree - inhabitant that in all probability run on even smaller mammal and insects .
The carnivore ancestorDormaalocyon latouri, roamed Europe 56 million years ago.
" It was n’t fearsome . It was n’t frightening , " said study researcher Floréal Solé , a fossilist at the Royal Belgian Institute of Natural Sciences in Brussels . What it was , Solé tell , is a clue to the beginnings of today ’s toothy beasts . [ In Photos : Mammals Through Time ]
" It is one of the oldest carnivorous mammals which is touch on to present - mean solar day carnivores , " Solé assure LiveScience .
Carnivore history
Ankle bones and teeth, including baby teeth, fromDormaalocyon
All moderncarnivoresdescend from a single mathematical group , one of four groups of carnivorous mammals found inthe Paleocene and Eocene periods , Solé said . The Paleocene ran from 66 million to 56 million years ago , and the Eocene followed from 56 to 33.9 million year ago .
The carnivoraforms , as they ’re known , come out widespread during the Eocene , but without earlier fossils , paleontologists are unsure about their origins . Solé and his workfellow examined fossils from the very early Eocene , about 56 million years ago , from Dormaal , Belgium , east of Brussels .
The land site was first discovered in the 1880s and has succumb 40 species of mammal over the years . Richard Smith , also of the Royal Belgian Institute of Natural Sciences , and a fellow of Solé ’s , has sieve about 14,000 teeth from the soil in Dormaal .
Among them are 280 new specimens of tooth from a species hint at antecedently from only two grinder . With the fresh data from the tooth ( including babe tooth from juvenile person ) and some ankle pearl , Solé , Smith and their colleagues described this specie today ( Jan. 6 ) in the Journal of Vertebrate Paleontology .
The ankle joint ivory fossils expose thatDormaalocyonlived an dendroidal life , skitter through the trees in what was then a humid , subtropical forest , the researchers report . It belike looked like something of a hybridizing between a tiny panther and a squirrel , with a long tail and a catlike nozzle .
redo the carnivore kin Sir Herbert Beerbohm Tree
The study substantiate previous work suggest that carnivore emerged during the Paleocene , beforeDormaalocyon ’s time , said Gregg Gunnell , the director of the division of dodo primate at the Duke Lemur Center in North Carolina , who was not involved in the enquiry .
" It really shows that there is a hatful of diversity very early in the Eocene , and we have absolutely no idea where it make out from , " Gunnell told LiveScience .
Part of the challenge of reveal carnivore account is that , on the whole , meat - eating mammals are n’t that vulgar , Gunnell said — there are many moreherbivoresand omnivore on the planet and in the fossil record . In addition , Solé said , fossils from Europe , which come along to be an authoritative stop for , and potentially the parentage of , carnivore evolution and spread , are rarer thanfossils from North America .
The geographic bloodline of the carnivoraforms stay mysterious , however . One hypothesis hold they rise in North America and spread to Europe ; the relationships of the fossils in Dormaal seem to suggest something more complex , Solé enounce . It ’s possible that carnivoraforms began in Asia and made it to North America through Europe .
With the current fossil record , however , it ’s just not possible to say for sure . Solé and his fellow will presently bring out a newspaper on a new fossil site in France from the later Paleocene — and a new carnivorous mammalian found there — that may hold answers .
" We need to witness some Paleocene deposits that give rise some variety of ancestors of these carnivoraforms , " Gunnell said . " We ’re lack a heavy ball of information . "
