Three truths
- Timed
- Branched off about 500 million years ago · the last 12% of life's story
- Named
- No living species
- Weighed
- Extinct: no biomass today.
Eukaryotes · animals
Ammonites
Extinct · died out about 66 million years ago, end of the Cretaceous
A full profile for this group has not been written yet. Its place in the tree and its dates are shown below.
Coiled-shell relatives of squid, gone with the dinosaurs.
- Branched off
- About 500 million years ago (approximate)
- Parent lineage
- Cephalopods
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