Three truths
- Timed
- Branched off about 540 million years ago · the last 13% of life's story
- Named
- ≈120,000 named living species · 6.7% of all named
- Weighed
- Part of Arthropods (≈1 Gt C), not measured separately.
Eukaryotes · animals
Spiders, scorpions and mites
Living · roughly 120,000 described species
A full profile for this group has not been written yet. Its place in the tree and its dates are shown below.
Spiders, scorpions, ticks and horseshoe crabs.
- Branched off
- About 540 million years ago (approximate)
- Parent lineage
- Arthropods
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