<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31409505</termId><termName>Cetacea</termName><termType>PT</termType><termNote><![CDATA[ Order containing around 80 species in extant 10 families, the living members characterized by being nearly fully adapted to aquatic life with a fusiform (streamlined) body, forelimbs modified into flippers, tiny vestigial hindlimbs that do not attach to the backbone and are hidden within the body, a tail with horizontal flukes, being nearly hairless, insulation provided by a thick layer of blubber, and typically  a high level of intelligence. ]]></termNote><termCreatedDate>2026-03-30 20:50:06</termCreatedDate><relation><relationType>UF</relationType><termId>31409506</termId><termName>cetacean</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31409507</termId><termName>cetaceans</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31409508</termId><termName>whales, dolphins, and porpoises</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31370451</termId><termName>Mammalia</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31409484</termId><termName>Placentalia</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31436013</termId><termName>whales</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31436015</termId><termName>dolphins</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31436017</termId><termName>porpoises</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31436019</termId><termName>Physeteridae</termName><termType>PT</termType></relation></term>  </Zthes>