An ancient dog found on a construction site in California is a new fossil of an archaeologist

A rare fossilAncient breed of dog It was recently discovered by a team of paleontologists in the United States. The skeleton, almost complete with all its parts, belongs to one ArcheologyA modern fox-like canyon that lived in the San Diego area 28 million years ago now.

A 28 million year old American canid

At the bottom left is the possible presence of some ancient species of canid, including the archaeocene
In the picture: At the bottom left is the possible presence of some ancient species of canid, including the archaeocene

Long before the arrival of humans, which occurred 14,000 years ago, and with its most trusted best friend, the Americas had already hosted other mammal members of the mammal family for millions of years. canids. In Greek Archeology Meaning “ancient dog”: Physically, the archeology was the size of a fox, with long legs and a short head.

Fossil remains were placed on two large sandstone and clay blocks and were unearthed at a construction site in the area in 2019. Ranch in it In San Diego County. The fossil is thought to be from the late Oligocene and is between 24 and 28 million years old. Since archaeologists are already incomplete and limited in number in the museum’s collection, new fossils will help a team of paleontologists fill in the blanks with what they know about these ancient American mammals.

Reconstruction of Diegoelurus, another ancient carnivorous animal widespread in California
In the picture: Reconstruction of Diegoelurus, another ancient carnivorous animal widespread in California

The discovery follows Diegoelurus, the oldest known indicator of carnivorous “saber-toothed” mammals a few months ago.

What do we learn from the new bone fragments?

Details of an archaeological skull
In the picture: Details of an archaeological skull

But What do we know? From the new shard of archeology? The new fossil is completely intact except for a part of its long tail. Some of its bones have been disfigured, probably due to the movement of the earth after the death of the animal, but the skull, teeth, spine, feet, ankles and toes are complete, which provides a great deal of information about evolutionary change. Archeology.

“It looks like you’ve found a branch of a tree, but you need more branches to figure out what kind of tree it is,” he said. Lynn, A paleontologist who spent about 120 hours from December to February to partially uncover the fragile, thin skeleton from the rock. “As soon as you discover the bones they start to break … I’ve used a lot of patience and lots of glue.”

Archaeological fossils have been found in the Pacific Northwest and Great Plains states, but rarely in Southern California, where glaciers and plate tectonics have scattered, destroyed, and buried many fossils since that historic period. Like Diegoiluras, this new discovery came from a construction site: II A new California law In fact, Any excavation work on public land must include a paleontological assessment The rocky layer dug by the workers, so that such treasures are not destroyed.

Paleontologist Pat Army He was looking at the rocks of a public road project about three years ago when he saw what they looked like Small white pieces of bone Coming out of an engraved rock. He marked the stone with a black marker and took it to the museum, where Scientific work soon ceased Almost Two years due to the epidemic. On December 2, Dr. Lin began working on two large stones using small carving tools and brushes. Slowly remove the layers of stone.

“Every time I discovered a new bone, the puzzle became clearer – Dr. Lynn explained – I was,” Oh look, this part matches this bone, that’s where the spine extends to the legs, that’s where the rest of the ribs are. ” Once the fossil bones and teeth of the fossil came out of the stone, it became clear that it was an ancient species of canine.

Although the ancient cats had only fleshy teeth, the omnivorous canine had sharp teeth both to kill and eat small mammals on the front and wide molar-like teeth on the back of the mouth used to crush plants, seeds and berries. This Dental mix And the shape of his skull helped experts identify the fossil as archeology.

The various morphologies of teeth are characteristic of omnivorous animals
In the picture: The various morphologies of teeth are characteristic of omnivorous animals

The length of the ankle bones where they will be attached to the Achilles tendon indicates that Archeology Was adapted To chase their prey for long distances Across the open grassland. It is also believed that they may have used strong, muscular tails For sharp turning and turning time balance, Just like a modern cheetah. Finally, from the formation of nails and feet, paleontologists believe that it was able to climb tree trunks, walk on tiptoes, and had non-retractable claws.

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