<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">Agnatha</topic></authority><related type="narrower"><topic>Petromyzonidae</topic></related><related type="narrower"><topic>Hyperotreti</topic></related><related type="broader"><topic>Vertebrata</topic></related><variant type="other"><topic>agnathans</topic></variant><variant type="other"><topic>fishes, jawless</topic></variant><variant type="other"><topic>jawless fish</topic></variant><variant type="other"><topic>jawless fishes</topic></variant> <note xml:lang="en"><![CDATA[ Class of vertebrates representing numerous primitive, fish-like, jawless animals, such as lampreys, hagfishes, and some extinct groups. Some classifications list Agnatha as a superclass with lampreys and hagfishes as classes. Jawless fishes probably arose from ancient small, softbodied filter-feeding organisms. ]]></note></mads>