单词	even-toed ungulate
释义	even-toed ungulate noun A hoofed mammal of an order which includes the ruminants, camels, pigs, and hippopotamuses. Mammals of this group have either two or four toes on each foot. Compare with odd-toed ungulate. Order Artiodactyla: three suborders. See also ruminant, tylopod. It is in these layers that fossils of odd-toed ungulates, even-toed ungulates, and primates first appear.... Traditional morphological taxonomy groups the even-toed ungulates within the order Artiodactyla. Notably, however, a recent and large-scale comparative analysis concluded that countershading may aid concealment in even-toed ungulates but that it is unlikely to do so in lagomorphs.
随便看	PVR PVS Pvt. p.w. PW PWA PWC PWD pwe pwine-end pwn pwnage PWR pwr. PWV PX pxt. PY pya pyaemia pyaemic pyarthrosis Pybuthrin pycnaspidean pycnial

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