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biology · education

Vertebrate class relationships

This illustrative phylogram compares selected vertebrate groups from lamprey through mouse. The tree highlights tetrapods, which include frog, lizard, pigeon and mouse, and amniotes, which include lizard, pigeon and mouse. Branch lengths are shown as substitutions per site, so they represent an amount of inferred evolutionary change rather than a calendar timeline.

Tipo Árbol filogenéticoNorma Newick + NHX extensionsMotor schematex-phyloActualizado 24/9/2026
Vertebrate Class Relationships
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La solicitud

“Create an illustrative vertebrate phylogram with lamprey, shark, salmon, frog, lizard, pigeon and mouse; highlight tetrapods and amniotes; and show branch lengths in substitutions per site.”

Entonces pruebaAdd a turtle to Amniotes.Change the layout to slanted.
Qué hay en este dibujo

Lee las decisiones que hay detrás.

01Outgroup

Use lamprey to orient the selected comparison.

02Clades

Highlight tetrapods and amniotes.

03Scale

Label branch length as substitutions per site.

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

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Preguntas frecuentes

Preguntas habituales

What does the branch scale mean?

It represents inferred substitutions per site, a measure of evolutionary change.

Why is lamprey included?

It provides an early-diverging reference in this selected vertebrate comparison.

Is this a complete vertebrate tree?

No. It uses selected groups to explain the major labelled clades.