BIOLOGY

Vertebrate class relationships

Vertebrate class relationship tree

UPDATED 2026-09-24
TYPEPhylo
EXAMPLEVertebrate class relationships
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CASE ANALYSIS

Scenario

A biology lesson needs a selected vertebrate tree with quantitative branch lengths.

Key decisions

  • Outgroup: Use lamprey to orient the selected comparison.
  • Clades: Highlight tetrapods and amniotes.
  • Scale: Label branch length as substitutions per site.

When to reuse this

Use this for an introductory relationship diagram, not as a complete taxonomy.

FAQ

Frequently asked questions

What does the branch scale mean?01
It represents inferred substitutions per site, a measure of evolutionary change.
Why is lamprey included?02
It provides an early-diverging reference in this selected vertebrate comparison.
Is this a complete vertebrate tree?03
No. It uses selected groups to explain the major labelled clades.
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