Three truths
- Timed
- Branched off about 600 million years ago · the last 14% of life's story
- Named
- ≈7,000 named living species · 0.4% of all named
- Weighed
- Part of All other animals (total minus the parts above) (≈0.13 Gt C), not measured separately.
Eukaryotes · animals
Starfish and sea urchins
Living · roughly 7,000 described species
A full profile for this group has not been written yet. Its place in the tree and its dates are shown below.
Starfish and sea urchins, built in fives.
- Branched off
- About 600 million years ago (approximate)
- Parent lineage
- Deuterostomes
Classification
Sources
- TimeTree: the timescale of life · TimeTree
- Open Tree of Life · Open Tree of Life
- Tree of Life Web Project · Tree of Life Web Project