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Perissodactyla. Perissodactyla ( / pəˌrɪsoʊˈdæktɪlə /, from Ancient Greek περισσός, perissós 'odd', and δάκτυλος, dáktylos 'finger, toe' [3]) is an order of ungulates. The order includes about 17 living species divided into three families: Equidae ( horses, asses, and zebras ), Rhinocerotidae ( rhinoceroses ), and ...
The sheath is two pronged, but the underlying bony core is unbranched. Artiodactyl - Hoofed, Even-Toed, Grazing: Artiodactyls have large stomachs and long intestines in order to digest plant food. Morphological characteristics include the weight-bearing axis of the leg passing through the third and fourth toes, and the astragalus.
Anexo. : Especies de Artiodactyla. A continuación se exponen, por orden alfabético, las 224 especies de artiodáctilos vivos, acompañadas por los géneros, tribus, subfamilias, familias y subórdenes existentes.
2018年2月1日 · The oldest known artiodactyl is Diacodexis, a creature that was about the size of a modern-day mouse deer. The three main groups of even-toed hoofed mammals arose by about 46 million years ago. At that time, even-toed hoofed mammals were by far outnumbered by their cousins the odd-toed hoofed mammals.
Description. Artiocetus clavis was a small whale measuring 2–3 m (6.6–9.8 ft) long. [2] It existed in the early Lutetian age (47 million years ago) and is one of the oldest known protocetid archaeocetes. Though the whale may have been primarily aquatic, the discovery of ankle bones lends to the idea that this fossil may have been a ...
Male okapis have short, distinct horn-like protuberances on their heads called ossicones, less than 15 cm (5.9 in) in length. Females possess hair whorls, and ossicones are absent. Okapis are primarily diurnal, but may be active for a few hours in darkness. They are essentially solitary, coming together only to breed.
Raoellidae. The Raoellidae, previously grouped within Helohyidae, are an extinct family of semiaquatic digitigrade artiodactyls in the clade Whippomorpha. Fossils of raoellids are found in Eocene strata of South and Southeast Asia. An exceptionally complete skeleton of Indohyus from Kashmir suggests that raoellids are the "missing link" sister ...
