In a new study, scientists have shed light on how some of Earth's earliest animals evolved. The team, led by researchers from the University of Oxford, used a combination of fossil evidence and computer modeling to trace the evolutionary history of lobopodians, a group of worm-like animals that lived during the Ediacaran period, approximately 635 million years ago.

Lobopodians are considered to be among the earliest known animals and are believed to have been the ancestors of arthropods, which include insects, spiders, and crustaceans. However, the evolutionary relationships between different lobopodian species have been unclear due to the limited fossil record.

To address this issue, the researchers used computer modeling to analyze the morphology of various lobopodian fossils. They found that the different species of lobopodians exhibited a range of body plans, including some with segmented bodies and others with more complex appendages.

Based on their analysis, the researchers proposed a new evolutionary tree for lobopodians, which suggests that they diversified into different lineages early in their history. This diversification may have been driven by environmental changes and the availability of new ecological niches.

The study provides new insights into the early evolution of animals and helps to fill gaps in our understanding of the ancestry of arthropods. It also highlights the importance of combining fossil evidence with computer modeling to reconstruct the evolutionary history of ancient organisms.