Three truths
- Timed
- Branched off about 520 million years ago · the last 12% of life's story
- Named
- ≈120 named living species · 0.007% of all named
- Weighed
- Part of Fish (≈0.7 Gt C), not measured separately.
Eukaryotes · animals
Hagfish and lampreys
Living · roughly 120 described species
A full profile for this group has not been written yet. Its place in the tree and its dates are shown below.
- Branched off
- About 520 million years ago (approximate)
- Parent lineage
- Vertebrates
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