Fossils of Baby Animals Can Be Misclassified

Topic: Biology

Scientists at Stony Brook University found that methods used to identify fossils can be unreliable. They tested these methods on living American and Chinese alligators and discovered that they failed to correctly classify the baby alligators.

Fossil finds are exciting moments in paleontology, but identifying ancient animal fossils is a challenging task. A paper published in Paleobiology by James Napoli, a researcher at Stony Brook University, aims to solve this problem.

Napoli tested two methods used by scientists: geometric morphometrics and cladistic analysis of ontogeny. Geometric morphometrics measures the shape of bones using 3D coordinates, while cladistic analysis uses computer algorithms to reconstruct evolutionary trees. Both methods are widely used for classifying fossils of juvenile animals.

However, Napoli's research revealed that these methods failed to correctly classify the living alligator specimens. They consistently misidentified the baby alligators as different species or associated them with the wrong species. This result suggests that these methods may be unreliable for classifying fossils.

But Napoli did not give up. He took a closer look at the data and found a solution. He discovered that certain traits, such as the anatomy of blood vessels and nerves, remain consistent in alligators even as they grow. These traits can serve as anatomical 'fingerprints' to identify fossils, even in very young animals.

Napoli's study has significant implications for vertebrate paleontology. It provides a new approach to correctly identifying ancient animal fossils.

Why It Matters

This discovery is important because it can help scientists accurately classify fossils of baby animals, which can provide valuable information about the evolution and diversity of life on Earth.

Key Facts

• Scientists at Stony Brook University tested methods used to identify fossils on living American and Chinese alligators.
• The methods failed to correctly classify the baby alligators as different species or associated them with the wrong species.
• Napoli discovered that certain traits, such as blood vessel anatomy, remain consistent in alligators even as they grow.
• These traits can serve as anatomical 'fingerprints' to identify fossils, even in very young animals.
• The study has significant implications for vertebrate paleontology and provides a new approach to correctly identifying ancient animal fossils.

Key Terms

Geometric morphometrics

A method that measures the shape of bones using 3D coordinates

Cladistic analysis of ontogeny

A method that uses computer algorithms to reconstruct evolutionary trees and study an organism's growth stages

Implications

This discovery is important because it can help scientists accurately classify fossils of baby animals, which can provide valuable information about the evolution and diversity of life on Earth.