<?xml version="1.0" encoding="UTF-8"?>
<term>
  <id>14914</id>
  <title>phylogeny</title>
  <longtitle>IUPAC Gold Book - phylogeny</longtitle>
  <doi>10.1351/goldbook.14914</doi>
  <code>14914</code>
  <status>current</status>
  <mentioned><em>mentioned</em>: phylogenesis</mentioned>
  <definitions>
    <item>
      <id>1</id>
      <text>Pattern of historical relationships between species or other groups resulting from divergence during evolution.</text>
      <notes>
        <item>Phylogenetic relationships are shown in diagrams (cladograms, phylogenetic trees, evolutionary trees).</item>
        <item>Palaeontology is important for understanding phylogeny. Without the fossils of the many groups of organisms now extinct, it could not be understood how present life forms are interrelated.</item>
        <item>Phylogenetics, the science of phylogeny, is part of the larger field of systematics, also including taxonomy.</item>
      </notes>
      <links>
        <item>
          <term>Palaeontology</term>
          <url>https://goldbook.iupac.org//terms/view/14898</url>
        </item>
        <item>
          <term>fossils</term>
          <url>https://goldbook.iupac.org//terms/view/14700</url>
        </item>
        <item>
          <term>phylogenetic trees</term>
          <url>https://goldbook.iupac.org//terms/view/14527</url>
        </item>
        <item>
          <term>phylogenetics</term>
          <url>https://goldbook.iupac.org//terms/view/14913</url>
        </item>
        <item>
          <term>taxonomy</term>
          <url>https://goldbook.iupac.org//terms/view/15090</url>
        </item>
      </links>
      <sources>
        <item>PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 926 (https://doi.org/10.1351/PAC-REC-08-07-09)</item>
      </sources>
    </item>
  </definitions>
  <altoutputs>
    <html>https://goldbook.iupac.org/terms/view/14914/html</html>
    <json>https://goldbook.iupac.org/terms/view/14914/json</json>
    <plain>https://goldbook.iupac.org/terms/view/14914/plain</plain>
  </altoutputs>
  <citation>Citation: 'phylogeny' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14914</citation>
  <license>The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.</license>
  <collection>If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .</collection>
  <disclaimer>The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.</disclaimer>
  <accessed>2026-05-30T16:49:51+00:00</accessed>
</term>
