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A recent research paper details the earliest identified proof of preserved skin.
The scaly exterior, resembling that of a crocodile, belonged to a prehistoric reptile from the Palaeozoic era, dating back 541-252 million years.
Scientists stated that this is the most ancient instance of conserved epidermis, which is the outer layer of skin found in terrestrial reptiles, birds, and mammals. This was a significant evolutionary adjustment during the shift to living on land.
Ethan Mooney, the primary author of the study, collaborated with paleontologist Robert Reisz at the University of Toronto during his undergraduate studies. Mooney stated, “Occasionally, we are given a remarkable chance to peer into the distant past.”
These findings have the potential to greatly enhance our comprehension and perspective of these pioneering creatures.
Skin and other soft tissues are not commonly preserved as fossils, but the scientists believe that the exceptional characteristics of the Richards Spur limestone cave system in Oklahoma, USA may have allowed for skin preservation in this particular case.
The characteristics consisted of small particles of clay that hindered the breakdown process, leakage of oil, and a cave setting that probably lacked oxygen.
Finding such an old skin fossil is an exceptional opportunity to peer into the past and see what the skin of some of these earliest animals may have looked like
The individual conducting the research and authoring the study is named Ethan Mooney.
The fossilized skin fragment in 3D form is extremely tiny, even smaller than a fingernail. Upon closer examination, microscopic analysis revealed the presence of epidermal tissues.
Mr. Mooney stated that what they witnessed was completely unexpected and unlike anything they would have anticipated.
“Discovering an ancient skin fossil presents a unique chance to look back in time and observe the potential appearance of the skin of some of the earliest creatures.”
The skin of this creature has similarities to both ancient and modern reptiles. It has a textured surface that is reminiscent of crocodile skin, as well as some skin features that are similar to those found in snakes and worm lizards.
Since there are no accompanying skeletal or other remains, it is not feasible to determine the specific species of animal or body part to which the skin fossil belonged.
Scientists propose that the similarity between this historic skin and the skin of present-day reptiles highlights the crucial role of these structures in ensuring survival.
According to Mr. Mooney, the epidermis played a crucial role in the survival of vertebrates on land.
“It serves as a vital barrier between the body’s internal processes and the harsh external environment.”
The scientists stated that this type of skin may be a primitive form that led to the development of bird feathers and mammalian hair follicles.
The study is available in the publication Current Biology.
Source: independent.co.uk
