A new study has a bone to pick with earlier researchers who concluded the domesticated dog has been around for 30,000 years.
New 3D analysis of skulls that had been identified as two of the earliest dogs shows they were actually wolves, a research team writes in the Nature journal Scientific Reports.
Fossilized remains that scientists said showed dogs date back at least 31,680 years — specifically those remains unearthed at Goyet Cave in Belgium — actually belonged to a wolf, according to a new study. So too, the new study says, did a 13,905-year-old fossil that was identified as belonging to a dog after it was found at a site called Eliseevichi in Russia.
The new study concludes that the the domestication of dogs happened during the Neolithic era (10,200 B.C.-2,000 B.C.) as opposed to the Paleolithic era (2.6 million years ago to 10,200 B.C.)
“Scientists have been eager to put a collar on the earliest domesticated dog,” lead author Abby Grace Drake said. “Unfortunately, their analyses weren’t sensitive enough to accurately determine the identity of these fossils.”
“Previous research has claimed that dogs emerged in the Paleolithic but this claim is based on inaccurate analyses,” Drake told Discovery News. “We reanalyzed some of the fossil canids from the Paleolithic and show that they are, in fact, wolves.”
“We did confirm that the Neolithic specimens Shamanka II (around 7,372 years old) and Ust’-Belaia (about 6,817 years old) are dogs, and therefore domestication took place by this time period or earlier,” added Drake, an assistant professor of biology at Skidmore College.
That means the wolves — who are generally (but not unanimously) believed to have evolved into dogs, possibly as a result of their interacting with humans — first appeared on earth after humans were farming and living in settlements, as opposed to when they were living in caves and hunting and gathering.
Drake and colleagues Michael Coquerelle and Guillaume Colombeau used scans and 3D visualization software to study the shape and size of the two oldest skulls and compare the data with measurements from the skulls of other dogs and wolves, according to a report on Phys.org.
That technique allowed the team to identify subtle morphological differences between dogs and wolves, such as the direction of the eye cavity and the angle between the muzzle and forehead.
(Photo: Abby Grace Drake, Skidmore College)
Posted by John Woestendiek February 6th, 2015 under Muttsblog.
Tags: analysis, animals, dog, dogs, domestication, evolution, fossilized, fossils, neolithic, origin, paleolithic, pets, remains, research, science, skidmore college, wolf, wolves
An international team of scientists has identified what it believes is the world’s first known dog, and says that it lived in Belgium 31,700 years ago — a good 17,000 years earlier than what was previously thought to be the earliest dog, found in Russia.
The prehistoric dog’s remains were excavated at Goyet Cave in Belgium, suggesting to the researchers that the Aurignacian people of Europe from the Upper Paleolithic period were the first to domesticate dogs, the Discovery Channel reports.
“The most remarkable difference between these dogs and recent dog breeds is the size of the teeth,” lead author Mietje Germonpre told Discovery News, comparing the tooth size more to wolves than dogs.
The scientists say — based on Isotopic analysis of the bones found — that the earliest dogs subsisted on horse, musk ox and reindeer.
Germonpre, a paleontologist at the Royal Belgian Institute of Natural Sciences, said the Paleolithic dogs most resemble the Siberian husky, but were somewhat larger.
For the study, which has been accepted for publication in the Journal of Archaeological Science, the scientists analyzed 117 skulls of recent and fossil large members of the Canidae family, which includes dogs, wolves and foxes.
Germonpre believes dog domestication might have begun when the prehistoric hunters killed a female wolf and then brought home her pups.
Posted by John Woestendiek October 17th, 2008 under Muttsblog.
Tags: archaeology, aurignacian, belgium, breeds, canidae, discovery, dogs, domestication, fossils, germonpre, goyet cave, news, origin, paleolithic, paleontology, prehistoric dog, russia, science, scientists, skulls, wolves, world's first dog