Paenungulata (infraclass Eutheria, cohort Ferungulata) A superorder that comprises herbivorous animals which diverged from the primitive Palaeocene ungulate stock to become ‘subungulates’ or ‘near ungulates’. The superorder includes the orders Hyracoidea (hyraxes), Proboscidea (elephants, their ancestors, and other elephant-like forms), Pantodonta, Dinocerata, Pyrotheria, Embrithopoda, and Sirenia (seacows or mermaids). It has been proposed recently, however, that the Hyracoidea belong to the Mesaxonia; some consider the Paenungulata to be an entirely artificial group and combine only the Proboscidea and Sirenia into a superorder, Tethytheria. In all of them the ulna and fibula are complete, and the upper bones of the limbs are long. The digits bear nails but, in most cases, not hoofs. Molars are specialized for grinding, and the incisors and canines are often reduced and modified to form tusks.
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humerus , humerus •Arras, embarrass, harass •gynandrous, polyandrous •Pancras • charas • Tatras • disastrous •ferrous • leprous • ambidextrous •Carreras, mayor… femur , fe·mur / ˈfēmər/ • n. (pl. fe·murs or fem·o·ra / ˈfemərə/ ) Anat. the bone of the thigh or upper hind limb, articulating at the hip and the knee. ∎ Z… You Might Also Like , ul·na / ˈəlnə/ • n. (pl. -nae / -ˌnē; -ˌnī/ or -nas ) the thinner and longer of the two bones in the human forearm, on the side opposite to the thumb… Musculoskeletal System , Skeletal System Overview (Morphology) When death has occurred weeks or months before a body is discovered, decomposition removes much of the body flu… ischium , is·chi·um / ˈiskēəm/ • n. (pl. -chi·a / -kēə/ ) the curved bone forming the base of each half of the pelvis. DERIVATIVES: is·chi·ad·ic / ˌiskēˈadik/… Skull , Skull Definition The skull—or cranium—is the skeleton of the head. It includes the brain case and the bones of the face and jaw. Description The skul…
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