<?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">Ostreoida</topic></authority><related type="narrower"><topic>Pectinidae</topic></related><related type="narrower"><topic>Ostreidae</topic></related><related type="narrower"><topic>oysters</topic></related><related type="narrower"><topic>Spondylidae</topic></related><related type="broader"><topic>Pteriomorphia</topic></related> <note xml:lang="en"><![CDATA[ Order of about 600 species of bivalves having unequal shell valves, typically lacking hinge teeth, with a shell structure of foliated calcite, and other distinguishing characteristics. ]]></note></mads>