Three truths
- Timed
- Began about 90 million years ago · the last 2.1% of life's story
- Named
- ≈5,300 named living species · 0.3% of all named
- Weighed
- At least ≈0.06 Gt C · 0.01% or more of all life's carbon
- Part of Livestock and wild mammals (≈0.11 Gt C), not measured separately.
Eukaryotes · animals
Boreoeutherians
Living · roughly 5,300 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 100 million years ago (approximate)
- Parent lineage
- Placental mammals
Child lineages
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
- › Synapsids
- › Therapsids
- › Mammals
- › Live-bearing mammals
- › Placental mammals
- › Boreoeutherians
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