<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31370454</termId><termName>Osteichthyes</termName><termType>PT</termType><termNote><![CDATA[ Class of acquatic animals (fish) characterized by possessing a skeleton at least partly composed of true bone (as opposed to cartilage) and typically a swim bladder (an air-filled sac to give buoyancy), a single pair of gills, gill covers over the gill chamber, bony platelike scales, a skull with sutures, and external fertilization of eggs. Modern bony fishes represent over 20,000 species in more than 400 families. In some classifications it is listed as a superclass instead of a class. ]]></termNote><termCreatedDate>2026-03-30 20:39:55</termCreatedDate><relation><relationType>UF</relationType><termId>31370455</termId><termName>Pisces</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31370456</termId><termName>bony fish</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31370457</termId><termName>bony fishes</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31370458</termId><termName>fishes, bony</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31339665</termId><termName>Vertebrata</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31370462</termId><termName>fish</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31409548</termId><termName>Siluriformes</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31409553</termId><termName>mudfishes</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31409556</termId><termName>Actinopterygii</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31409561</termId><termName>Sarcopterygii</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31409565</termId><termName>Cypriniformes</termName><termType>PT</termType></relation></term>  </Zthes>