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<!doctype html><html lang=en><head><meta charset=UTF-8><meta name=viewport content="width=device-width,initial-scale=1"><title>International Society for Phylogenetic Nomenclature</title><link rel=stylesheet href="https://fonts.googleapis.com/css?family=Open+Sans:400,400i,700,700i&display=swap"><link rel=stylesheet href=https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css><link rel=stylesheet href=/index.css><script src=/index.js></script></head><body><nav id=site-nav><div><header><a href=/ ><abbr title="International Society for Phylogenetic Nomenclature">ISPN</abbr></a></header><ul id=site-nav-content><li><a href=/about>About</a></li><li><a href=/membership>Join</a></li><li><a href=/code><cite><abbr title="International Code of Phylogenetic Nomenclature">PhyloCode</abbr></cite></a></li><li><a href=/news>News</a></li><li><a href=/literature>Literature</a></li><li><a href=/events>Events</a></li><li><a href=/documents>Documents</a></li></ul><button id=site-nav-button>☰</button></div></nav><nav id=code-nav><ul><li><a href=/code#toc><strong>Table of Contents</strong></a></li><li class="folder closed"><a href=/code/preface><strong>Preface</strong></a><ul><li><a href=/code/preface#properties><strong>Properties of Phylogenetic Nomenclature</strong></a></li><li><a href=/code/preface#advantages><strong>Advantages of Phylogenetic Nomenclature</strong></a></li><li><a href=/code/preface#history><strong>History</strong></a></li><li><a href=/code/preface#acknowledgments><strong>Acknowledgments</strong></a></li><li><a href=/code/preface/literature-cited><strong>Literature Cited</strong></a></li></ul></li><li><a href=/code/preamble><strong>Preamble</strong></a></li><li><a href=/code/divisions/1><strong>Division I</strong>. Principles</a></li><li class="folder open"><a href=/code/divisions/2><strong>Division II</strong>. Rules</a><ul><li class="folder closed"><a href=/code/chapters/1><strong>Chapter I</strong>. Taxa</a><ul><li><a href=/code/articles/1><strong>Article 1</strong>. Categories of Taxa</a></li><li><a href=/code/articles/2><strong>Article 2</strong>. Clades</a></li><li><a href=/code/articles/3><strong>Article 3</strong>. Hierarchy and Rank</a></li></ul></li><li class="folder closed"><a href=/code/chapters/2><strong>Chapter II</strong>. Publication</a><ul><li><a href=/code/articles/4><strong>Article 4</strong>. Publication Requirements</a></li><li><a href=/code/articles/5><strong>Article 5</strong>. Publication Date</a></li></ul></li><li class="folder closed"><a href=/code/chapters/3><strong>Chapter III</strong>. Names</a><ul><li><a href=/code/articles/6><strong>Article 6</strong>. Categories of Names</a></li><li><a href=/code/articles/7><strong>Article 7</strong>. General Requirements for Establishment</a></li><li><a href=/code/articles/8><strong>Article 8</strong>. Registration</a></li></ul></li><li class="folder closed"><a href=/code/chapters/4><strong>Chapter IV</strong>. Establishment of Clade Names</a><ul><li><a href=/code/articles/9><strong>Article 9</strong>. General Requirements and Phylogenetic Definitions</a></li><li><a href=/code/articles/10><strong>Article 10</strong>. Selection of Clade Names for Establishment</a></li><li><a href=/code/articles/11><strong>Article 11</strong>. Specifiers and Qualifying Clauses</a></li></ul></li><li class="folder closed"><a href=/code/chapters/5><strong>Chapter V</strong>. Selection of Accepted Clade Names</a><ul><li><a href=/code/articles/12><strong>Article 12</strong>. Precedence</a></li><li><a href=/code/articles/13><strong>Article 13</strong>. Homonymy</a></li><li><a href=/code/articles/14><strong>Article 14</strong>. Synonymy</a></li><li><a href=/code/articles/15><strong>Article 15</strong>. Conservation, Suppression and Emendation</a></li></ul></li><li class="folder closed"><a href=/code/chapters/6><strong>Chapter VI</strong>. Hybrids</a><ul><li><a href=/code/articles/16><strong>Article 16</strong>. Provisions for Hybrids</a></li></ul></li><li class="folder closed"><a href=/code/chapters/7><strong>Chapter VII</strong>. Orthography</a><ul><li><a href=/code/articles/17><strong>Article 17</strong>. Orthographic Requirements for Establishment</a></li><li><a href=/code/articles/18><strong>Article 18</strong>. Subsequent Use and Correction of Established Names</a></li></ul></li><li class="folder closed"><a href=/code/chapters/8><strong>Chapter VIII</strong>. Authorship</a><ul><li><a href=/code/articles/19><strong>Article 19</strong>. Authorship of Names and Definitions</a></li></ul></li><li class="folder closed"><a href=/code/chapters/9><strong>Chapter IX</strong>. Citation</a><ul><li><a href=/code/articles/20><strong>Article 20</strong>. Citation of Authors and Registration Numbers</a></li></ul></li><li class="folder closed"><a href=/code/chapters/10><strong>Chapter X</strong>. Species Names</a><ul><li><a href=/code/articles/21><strong>Article 21</strong>. Provisions for Species Names</a></li></ul></li><li class="folder closed"><a href=/code/chapters/11><strong>Chapter XI</strong>. Governance</a><ul><li><a href=/code/articles/22><strong>Article 22</strong>. Governance of Phylogenetically Defined Names</a></li></ul></li></ul></li><li><a href=/code/glossary><strong>Glossary</strong></a></li><li class="folder closed"><a href=/code/appendices><strong>Appendices</strong></a><ul><li><a href=/code/appendices/a><strong>Appendix A</strong>. Registration Procedures and Data Requirements</a></li><li><a href=/code/appendices/b><strong>Appendix B</strong>. Code of Ethics</a></li><li><a href=/code/appendices/c><strong>Appendix C</strong>. Equivalence of Nomenclatural Terms Among Codes</a></li></ul></li><li><a href=/code/index/ ><strong>Index</strong></a></li></ul></nav><main><header><h1>Page Not Found</h1></header><article><p>Go to the <a href=/ >Home Page</a>.</p></article></main><nav id=page-nav><span class=copyright><abbr title=Copyright>©</abbr> <time>2020</time> <abbr title="International Society for Phylogenetic Nomenclatural">ISPN</abbr></span></nav><script>var _gaq=_gaq||[];_gaq.push(["_setAccount","UA-38183037-1"]),_gaq.push(["_trackPageview"]),function(){var t=document.createElement("script");t.type="text/javascript",t.async=!0,t.src=("https:"==document.location.protocol?"https://ssl":"http://www")+".google-analytics.com/ga.js";var e=document.getElementsByTagName("script")[0];e.parentNode.insertBefore(t,e)}()</script></body></html>