Mysterious fossils find place on the tree of life.
Since I was a little child I'm fascinated by ancient and aqua life, I was reading something on the internet and I found out that this week was discovered that some mysterious fossils play an important role in the tree of life. This animal that lived on the ocean floor 500 million years ago has been assigned to the tree of life, solving a long-held mystery. The creature has problematized the scientistic classification since the first fossil was discovered 175 years ago. The extinct hyolith has a cone-shaped shell, tentacles for feeding and appendages that acted as "feet". It's belonged to an invertebrate group such as the horseshoe worm, say scientists. Their appear in the fossil record is about 530 million years ago and survived until about 250 million years ago. The research suggests the animals are related to a different group of shell-bearing organisms, known as lophophorata, which includes brachipods (lamp shells), among others.