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Hippidion
''Hippidion'' (meaning ''little horse'') is an extinct genus of Equinae, equine that lived in South America from the Late Pliocene to the end of the Late Pleistocene (Lujanian), between two million and 11,000 years ago. They were one of two lineages of equines native to South America during the Pleistocene epoch, alongside those of the ''Equus (genus), Equus'' subgenus ''Amerhippus''. Evolution ''Hippidion'' has been considered a Lineal descendant, descendant of Evolution of the horse#Pliohippus, pliohippines, equines that migrated into the South American continent around 2.5 million years ago. Early analysis of the ancient DNA of ''Hippidion'' and other New World Pleistocene equines supported the novel hypothesis that ''Hippidion'' was actually a member of the living genus ''Equus (genus), Equus'', with a particularly close relationship to the wild horse, ''Equus ferus''. However this was later shown to be incorrect, with more complete sequences finding ''Hippidion'' as an ou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hippidion 23
''Hippidion'' (meaning ''little horse'') is an extinct genus of Equinae, equine that lived in South America from the Late Pliocene to the end of the Late Pleistocene (Lujanian), between two million and 11,000 years ago. They were one of two lineages of equines native to South America during the Pleistocene epoch, alongside those of the ''Equus (genus), Equus'' subgenus ''Amerhippus''. Evolution ''Hippidion'' has been considered a Lineal descendant, descendant of Evolution of the horse#Pliohippus, pliohippines, equines that migrated into the South American continent around 2.5 million years ago. Early analysis of the ancient DNA of ''Hippidion'' and other New World Pleistocene equines supported the novel hypothesis that ''Hippidion'' was actually a member of the living genus ''Equus (genus), Equus'', with a particularly close relationship to the wild horse, ''Equus ferus''. However this was later shown to be incorrect, with more complete sequences finding ''Hippidion'' as an ou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hippidion
''Hippidion'' (meaning ''little horse'') is an extinct genus of Equinae, equine that lived in South America from the Late Pliocene to the end of the Late Pleistocene (Lujanian), between two million and 11,000 years ago. They were one of two lineages of equines native to South America during the Pleistocene epoch, alongside those of the ''Equus (genus), Equus'' subgenus ''Amerhippus''. Evolution ''Hippidion'' has been considered a Lineal descendant, descendant of Evolution of the horse#Pliohippus, pliohippines, equines that migrated into the South American continent around 2.5 million years ago. Early analysis of the ancient DNA of ''Hippidion'' and other New World Pleistocene equines supported the novel hypothesis that ''Hippidion'' was actually a member of the living genus ''Equus (genus), Equus'', with a particularly close relationship to the wild horse, ''Equus ferus''. However this was later shown to be incorrect, with more complete sequences finding ''Hippidion'' as an ou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hippidion Principale 4333
''Hippidion'' (meaning ''little horse'') is an extinct genus of equine that lived in South America from the Late Pliocene to the end of the Late Pleistocene (Lujanian), between two million and 11,000 years ago. They were one of two lineages of equines native to South America during the Pleistocene epoch, alongside those of the '' Equus'' subgenus ''Amerhippus''. Evolution ''Hippidion'' has been considered a descendant of pliohippines, equines that migrated into the South American continent around 2.5 million years ago. Early analysis of the ancient DNA of ''Hippidion'' and other New World Pleistocene equines supported the novel hypothesis that ''Hippidion'' was actually a member of the living genus '' Equus'', with a particularly close relationship to the wild horse, ''Equus ferus''. However this was later shown to be incorrect, with more complete sequences finding ''Hippidion'' as an outgroup to all living equines and less closely related to living equines than the "New Wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolution Of The Horse
The evolution of the horse, a mammal of the family Equidae, occurred over a geologic time scale of 50 million years, transforming the small, dog-sized, forest-dwelling '' Eohippus'' into the modern horse. Paleozoologists have been able to piece together a more complete outline of the evolutionary lineage of the modern horse than of any other animal. Much of this evolution took place in North America, where horses originated but became extinct about 10,000 years ago. The horse belongs to the order Perissodactyla (odd-toed ungulates), the members of which all share hooved feet and an odd number of toes on each foot, as well as mobile upper lips and a similar tooth structure. This means that horses share a common ancestry with tapirs and rhinoceroses. The perissodactyls arose in the late Paleocene, less than 10 million years after the Cretaceous–Paleogene extinction event. This group of animals appears to have been originally specialized for life in tropical forests, but wherea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haringtonhippus
''Haringtonhippus'' is an extinct genus of stilt-legged equine from the Pleistocene of North America The genus is monospecific, consisting of the species ''H. francisci'', initially described in 1915 by Oliver Perry Hay as ''Equus francisci''. Prior to its formal description, it was sometimes referred to as the New World stilt-legged horse. ''Haringtonhippus'' fossils have only been discovered in North America. Specimens have been found from southern Mexico to southern South Dakota and in Alberta, Canada, at sites such as Gypsum Cave and Natural Trap Cave, as well as eastern Beringia in Yukon A later study found that ''Equus cedralensis'' from the Late Pleistocene of Mexico also belonged to this species. The earliest species of the lineage appeared in North America during the Late Pliocene to Early Pleistocene, around 2 to 3 Ma. It became extinct at the end of the Late Pleistocene. Taxonomy ''Haringtonhippus'' is named after Charles Richard Harington. It was originally described ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equus (genus)
''Equus'' , is a genus of mammals in the family Equidae, which includes horses, donkeys, and zebras. Within the Equidae, ''Equus'' is the only recognized extant genus, comprising seven living species. Like Equidae more broadly, ''Equus'' has numerous extinct species known only from fossils. The genus most likely originated in North America and spread quickly to the Old World. Equines are odd-toed ungulates with slender legs, long heads, relatively long necks, manes (erect in most subspecies), and long tails. All species are herbivorous, and mostly grazers, with simpler digestive systems than ruminants but able to subsist on lower-quality vegetation. While the domestic horse and donkey (along with their feral descendants) exist worldwide, wild equine populations are limited to Africa and Asia. Wild equine social systems are in two forms; a harem system with tight-knit groups consisting of one adult male or stallion, several females or mares, and their young or foals; and a terr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wild Horse
The wild horse (''Equus ferus'') is a species of the genus ''Equus'', which includes as subspecies the modern domesticated horse (''Equus ferus caballus'') as well as the endangered Przewalski's horse (''Equus ferus przewalskii''). The European wild horse known as the tarpan that went extinct in the late 1800s has previously been classified as a subspecies of wild horse (''Equus ferus ferus''), but more recent studies have cast doubt on whether those horses were truly wild or if they actually were feral horses or hybrids.Tadeusz Jezierski, Zbigniew Jaworski: ''Das Polnische Konik. Die Neue Brehm-Bücherei Bd. 658'', Westarp Wissenschaften, Hohenwarsleben 2008, Przewalski's horse had reached the brink of extinction but was reintroduced successfully into the wild. The tarpan became extinct in the 19th century but is theorized to have been present on the steppes of Eurasia at the time of domestication. However, other subspecies of ''Equus ferus'' may have existed and could have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amerhippus
''Amerhippus'' is an extinct South American horse of uncertain taxonomic identity. It is sometimes classified as a subgenus of the genus '' Equus'', containing several extinct species of horses that lived in South America, or a single, morphologically variable extinct species, ''Equus neogeus.'' Description It lived from 2.588 to 0.012 Mya. It measured roughly tall and weighed approximately . Distribution They were one of two groups of equines in South America, alongside ''Hippidion''. Fossils have been recovered from the Tarija Formation of Bolivia, the Serranía del Perijá in Venezuela, the Chiu-Chiu Formation of Chile, the Sabana Formation of the Bogotá savanna in Colombia, and from various locations in Ecuador. Ecology A 2019 study suggested that ''Equus neogeus'' was primarily a grazer that fed on both C4 and C3 grasses in prairies and open woodlands. Taxonomy While they have formerly been referred to as belonging to 5 separate species, this has been r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hand (length)
The hand is a non- SI unit of measurement of length standardized to . It is used to measure the height of horses in many English-speaking countries, including Australia, Canada, the Republic of Ireland, the United Kingdom, and the United States. It was originally based on the breadth of a human hand. The adoption of the international inch in 1959 allowed for a standardized imperial form and a metric conversion. It may be abbreviated to "h" or "hh". Although measurements between whole hands are usually expressed in what appears to be decimal format, the subdivision of the hand is not decimal but is in base 4, so subdivisions after the radix point are in quarters of a hand, which are inches. Thus, 62 inches is fifteen and a half hands, or 15.2 hh (normally said as "fifteen-two", or occasionally in full as "fifteen hands two inches"). Terminology "Hands" may be abbreviated to "h", or "hh". The "hh" form is sometimes interpreted as standing for "hands high". When spoken alo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donkey
The domestic donkey is a hoofed mammal in the family Equidae, the same family as the horse. It derives from the African wild ass, ''Equus africanus'', and may be classified either as a subspecies thereof, ''Equus africanus asinus'', or as a separate species, ''Equus asinus''. It was domesticated in Africa some years ago, and has been used mainly as a working animal since that time. There are more than 40 million donkeys in the world, mostly in underdeveloped countries, where they are used principally as draught or pack animals. While working donkeys are often associated with those living at or below subsistence, small numbers of donkeys or asses are kept for breeding or as pets in developed countries. A male donkey is known as a ''jack'' or ''jackass'', a female is a ''jenny'' or ''jennet'', and an immature donkey of either sex is a '' foal''. Jacks are often mated with female horses (mares) to produce '' mules''; the less common hybrid of a male horse (stallion) and j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nasal Bone
The nasal bones are two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face and by their junction, form the bridge of the upper one third of the nose. Each has two surfaces and four borders. Structure The two nasal bones are joined at the midline internasal suture and make up the bridge of the nose. Surfaces The ''outer surface'' is concavo-convex from above downward, convex from side to side; it is covered by the procerus and nasalis muscles, and perforated about its center by a foramen, for the transmission of a small vein. The ''inner surface'' is concave from side to side, and is traversed from above downward, by a groove for the passage of a branch of the nasociliary nerve. Articulations The nasal articulates with four bones: two of the cranium, the frontal and ethmoid, and two of the face, the opposite nasal and the maxilla. Other animals In primitive bony fish and tetrapod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South American Pleistocene Equids
South is one of the cardinal directions or compass points. The direction is the opposite of north and is perpendicular to both east and west. Etymology The word ''south'' comes from Old English ''sūþ'', from earlier Proto-Germanic ''*sunþaz'' ("south"), possibly related to the same Proto-Indo-European root that the word ''sun'' derived from. Some languages describe south in the same way, from the fact that it is the direction of the sun at noon (in the Northern Hemisphere), like Latin meridies 'noon, south' (from medius 'middle' + dies 'day', cf English meridional), while others describe south as the right-hand side of the rising sun, like Biblical Hebrew תֵּימָן teiman 'south' from יָמִין yamin 'right', Aramaic תַּימנַא taymna from יָמִין yamin 'right' and Syriac ܬܰܝܡܢܳܐ taymna from ܝܰܡܝܺܢܳܐ yamina (hence the name of Yemen, the land to the south/right of the Levant). Navigation By convention, the ''bottom or down-facing side'' of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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