Evolution Of Tail: Evidence Found In Fish Fossil
Evolution brings new traits and features to living things. This is part of a species adapting to a new environment. As a species goes to a new place, slowly it adapts over time to acquire a new trait or feature. One example of this is the evolution of the tail, whose evidence is found in the fish fossil.
An ancient fish has shown that early in its life it had two tail outgrowths. One is a fleshy tail while the other is a flexible fin. As the fish grows, one of those features gradually disappeared. Modern day ray-finned fishes have been seen as well to have this early trait.
The fossils of the early fish have never been studied before. These fossils represent the early stages of Aetheretmon valentiacum, which is related to modern day fishes. Some of the fossils are as small as three centimeters long.
The adult Aetheretmon fish would eventually have a tail that is longer at the top than at the bottom. This trait is still found in some fishes today. Sturgeon and paddlefish possess this trait, and have been referred as modern fossils since they still retain many ancient fish characteristics. Most modern fishes, on the other hand, have a more symmetrical tail. This two-part structure of the tail has been around for some time in both living and extinct fishes.
Lauren Sallan, assistant professor in the Department of Earth and Environmental Science at the University of Pennsylvania said that modern and ancient fishes have a similar starting point. At some point the tail structure began to be adjusted on modern fishes, according to Penn News. This two-tail structure would be adjusted on modern fishes later on.
The two-tail structure would also be found in modern land-based animals such as the tetrapods, as Science Daily reports. The outgrowth on Aetheretmon will ultimately be the tail in many animals later. Sallan said that the two structures might have been controlled by the genes, so that later on this trait would find different forms of adaptation in various creatures.
Evolution has shown that adaptation would lead to different structures in animals. An example of this is the evolution of the tail, whose evidence is found in the early fish fossil. Adaptation can be found also in human evolution, as one of the earliest hominids has been a tree climber.
Human Ancestor ‘Lucy’ More Of A Tree Climber
Anthropologists continue to learn more about "Lucy." The early human ancestor "Lucy" might be more of a tree climber, as a recent study suggests.
Early Life Forms Survived Without Oxygen, Evidence Shows
Oxygen is important for life today. The early Earth though didn't have much oxygen as it does now, yet there has been life even during that time. Early life forms on Earth survived without oxygen, as evidence shows.
Neanderthal Genes Gave Homo Sapiens The Ability To Adapt
Much of what people have is because Neanderthal genes gave Homo sapiens the ability to adapt to the environment.
Birds Beat Dinos: CT Scans Of 3D Skulls Reveal Larger Brain To Body Scale On Modern Avians
Scientists figured out why birds beat out the dinosaurs in the survival of the fittest against the massive asteroid of prehistoric times
Low Oxygen Delayed Evolution Billions Of Years Ago
Evolution came about slowly on Earth. Low oxygen delayed evolution billions of years ago.
MORE IN ITECHPOST
Do You Need A Wireless Mouse For Working At Home? Here Are 3 Mice You Should Consider
Are you working at home and looking to buy a wireless mouse? Here are some of the best wireless mice you can get for working at home from Amazon right now in 2020.
CEO Peter Beck’s Apology Has Elon Musk and Other Competitors Support After Launch Failure
After the failure of the 13th attempt to reach orbit with Electron, Rocket Labs CEO Peter Beck has given out a public apology on Twitter. This has led to competitors, which include Elon Musk, to offer their support.
Will 'Grand Theft Auto 6' Have a World That Evolves Like How The World in 'Red Dead Redemption 2' Did?
The evolution of the world throughout the story of 'Red Dead Redemption 2' was something nice to see, but will Rockstar's next game, 'Grand Theft Auto 6' have this sort of world evolution?
The Social Media Influencer with Thousands of Followers But Isn't a Real Person
If you are familiar with Hatsune Miku, a teenage singer with long, turquoise twintails who is Japan's first and official moe anthropomorph, then you must be prepared to meet Japan's first virtual male influencer, Liam Nikuro.