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synapomorphic trait

evolution
Also known as: synapomorphy

Quick Summary

A synapomorphic trait is a characteristic shared by two or more related taxonomic groups that evolved from a common ancestral form. These traits are crucial in evolutionary biology and taxonomy for understanding relationships between organisms.12

In the study of evolution, identifying synapomorphies helps in reconstructing evolutionary trees. These trees illustrate how species or groups of organisms are related through shared ancestry. For example, retractable claws are a synapomorphic trait shared by domestic cats, tigers, and leopards, indicating their common ancestry after their lineage diverged from that of dogs and wolves.3

Synapomorphies are distinct from autapomorphies, which are traits unique to a single taxonomic group. By analyzing synapomorphic traits, scientists can infer evolutionary history and classify organisms based on their shared derived characteristics.423

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