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Modern hoofed mammals comprise four orders: Artiodactyla (swine, camels, deer
, and bovines); Perissodactyla (horses, tapirs, and rhinoceroses); Proboscidea (
elephants); and Hyracoidea (hyraxes). Ten orders of fossil ungulates are also ...
Xiphocentrionidae, family of caddisflies of the order Trichoptera, class Insecta.
classification and basic characteristics 18:710d Xiphocolaptes major (bird): see
woodcreeper. Xiphodontidae, extinct family of the mammalian order Artiodactyla
Yajurveda (Hindu sacred literature): see Vedas. yak (Bos grunniens), large,
massively built ox, family Bovidae (order Artiodactyla), of the Tibetan plateaus
4,300–6,100 metres (14,000– 20,000 feet) above sea level. Yak (Bos grunniens)
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review