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Mesonychidae (meaning "middle claws") is an extinct family of small to large-sized omnivorous-carnivorous mammals.They were endemic to North America and Eurasia during the Early Paleocene to the Early Oligocene, and were the earliest group of large carnivorous mammals in Asia.
Mesonychia ("middle claws") is an extinct taxon of small- to large-sized carnivorous ungulates related to artiodactyls. Mesonychians first appeared in the early Paleocene, went into a sharp decline at the end of the Eocene, and died out entirely when the last genus, Mongolestes, became extinct in the early Oligocene. In Asia, the record of ...
Ungulates are typically herbivorous and many employ specialized gut bacteria to enable them to digest cellulose, though some members may deviate from this: several species of pigs and the extinct entelodonts are omnivorous, while cetaceans and the extinct mesonychians are carnivorous.
Ungulates are distinguished by the structure of their feet and how they walk. The hoof is made of an outer layer of keratin called unguis. Instead of horn-shaped feet, elephants have wide stump ...
Skull. Morphologists long thought that Sinonyx was the direct ancestor of Cetacea (whales and dolphins), but the discovery of well-preserved hind limbs of archaic cetaceans as well as more recent DNA phylogenetic analyses [3] [4] [5] now indicates that cetaceans are more closely related to hippopotamids and other artiodactyls than they are to mesonychids, and this result is consistent with ...
Some researchers use "even-toed ungulates" to exclude cetaceans and only include terrestrial artiodactyls, making the term paraphyletic in nature. The roughly 270 land-based even-toed ungulate species include pigs , peccaries , hippopotamuses , antelopes , deer , giraffes , camels , llamas , alpacas , sheep , goats and cattle .
Ancient swimming ‘taco’ had ‘bug jaws,’ new fossils show. Mindy Weisberger, CNN. July 30, 2024 at 11:49 AM. ... For the new investigation, the researchers examined around 150 fossils ...
Scientists have found the U.K.’s largest dinosaur footprint site ever. The tracks were discovered in a quarry in Oxfordshire — about 60 miles northwest of London — by quarry employee Gary ...