<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31409615</termId><termName>Archaeornithes</termName><termType>PT</termType><termNote><![CDATA[ Extinct subclass of birds having teeth in both jaws, a long, feathered tail, by being less specialized for flight than modern birds, a body elongated and reptilelike, forelimbs with three clawed digits, a small brain and eyes, and bones that are not filled with air (nonpneumatic). ]]></termNote><termCreatedDate>2026-03-30 20:50:08</termCreatedDate><relation><relationType>BT</relationType><termId>31370464</termId><termName>Aves</termName><termType>PT</termType></relation></term>  </Zthes>