Three truths
- Timed
- Branched off about 300 million years ago · the last 7.1% of life's story
- Named
- No living species
- Weighed
- Extinct: no biomass today.
Eukaryotes · animals
Plesiosaurs
Extinct · died out about 66 million years ago, end of the Cretaceous
The date or placement of this group is still debated.
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 300 million years ago (approximate)
- Parent lineage
- Reptiles and birds
Classification
- First common ancestor (LUCA)
- › Archaea
- › Asgard archaea
- › Heimdall and complex-cell line
- › Complex cells (eukaryotes)
- › Amorphea
- › Opisthokonts
- › Holozoa
- › Animals
- › Parahoxozoa
- › Bilaterians
- › Deuterostomes
- › Chordates
- › Vertebrates
- › Jawed vertebrates
- › Bony vertebrates
- › Lobe-finned vertebrates
- › Four-limbed vertebrates
- › Amniotes
- › Reptiles and birds
- › Plesiosaurs
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