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Tragulus is a genus of even-toed ungulates in the family Tragulidae that are known as mouse-deer. [1] In Ancient Greek τράγος (tragos) means a male goat, [2] while the Latin diminutive –ulus means 'tiny'.
The two extant orders of ungulates are the Perissodactyla (odd-toed ungulates) and Artiodactyla (even-toed ungulates). Hyracoidea (hyraxes) , Sirenia (sea cows, dugongs and manatees) and Proboscidea (elephants) were in the past grouped within the clade "Ungulata", later found to be a polyphyletic and now invalid clade.
The white rhinoceros is the largest living perissodactyl. Perissodactyla (/ p ə ˌ r ɪ s oʊ ˈ d æ k t ɪ l ə /, from Ancient Greek περισσός, perissós 'odd' and δάκτυλος, dáktylos 'finger, toe' [3]), or odd-toed ungulates, is an order of ungulates.
The preorbital gland is a paired exocrine gland found in many species of artiodactyls, which is homologous to the lacrimal gland found in humans. These glands are trenchlike slits of dark blue to black, nearly bare skin extending from the medial canthus of each eye.
Ungulates (meaning roughly "hoofed" or "hoofed animal") are several groups of mammals most of which use the tips of their toes, usually hoofed, to sustain their whole bodyweight whilst moving. The main article for this category is ungulate .
The Java mouse-deer (Tragulus javanicus) [2] is a species of even-toed ungulate in the family Tragulidae. When it reaches maturity it is about the size of a rabbit , making it the smallest living ungulate .
Condylarthra always was a problematic group. When first described by Cope 1881, Phenacodontidae was the type and only family therein. Cope 1885, however, raised Condylarthra to an order and included a wide range of diverse placentals with generalized dentitions and postcranial skeletons.
The even-toed ungulates are ungulates whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in perissodactyls. There are about 220 artiodactyl species, including many that are of great economic importance to humans. Family Suidae (pigs) Genus: Babyrousa. Buru babirusa, B. babyrussa VU