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Merycodontinae
Merycondontinae is a subfamily of pronghorn that arose during the middle of the Miocene and became extinct by the end of that period. The Merycondontinae were small, slightly built, fast-running ungulate Ungulates ( ) are members of the diverse clade Euungulata ("true ungulates"), which primarily consists of large mammals with Hoof, hooves. Once part of the clade "Ungulata" along with the clade Paenungulata, "Ungulata" has since been determined ...s. Both males and females were horned. The genera ''Meryceros'' and ''Submeryceros'' are generally regarded as synonymous with '' Merycodus''. References *Byers, John A.; American Pronghorn: Social Adaptations & the Ghosts of Predators Past; University of Chicago Press; 1998 Prehistoric pronghorns {{paleo-eventoedungulate-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paracosoryx
''Paracosoryx'' is an extinct genus of antilocaprids that lived in North America during the Miocene. Taxonomy It was originally described as a subgenus of ''Cosoryx'', but was elevated to full genus status. It has been suggest that ''Paracosoryx'' is paraphyletic, with some species more related to members of other genera than each other. Description The burr of ''Paracoryx'' is located relatively high on the shaft compared to other members of Merycodontinae. The horn shaft is relatively long, with small, curved tines. References {{Taxonbar, from=Q108280693 Prehistoric Artiodactyla genera Prehistoric pronghorns Miocene Artiodactyla Miocene mammals of North America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ramoceros
''Ramoceros'' is an extinct genus of the artiodactyl family Antilocapridae endemic to Middle Miocene (Clarendonian) North America.Blount, Kitty and Crowley, Maggie. ''Encyclopedia of Dinosaurs & Prehistoric Life'', p. 271 (Penguin, 2008). Taxonomy ''Ramoceros'' is one of several genera that originated from the subfamily Merycodontinae, of which the pronghorn is the only surviving remnant. In fact, pronghorn is the only surviving remnant of the entire family Antilocapridae.Smithsonian Institution. North American MammalsPronghorn ''Antilocapra americana''/ref> '' Merriamoceros'' was originally placed in ''Ramoceros'' (as ''Ramoceros coronatus''). Description ''Ramoceros'' was a prehistoric relative of modern pronghorn (''Antilocapra americana''), which is a species of artiodactyl mammal A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antilocapridae
The Antilocapridae are a family of ruminant artiodactyls endemic to North America. Their closest extant relatives are the giraffids. Only one species, the pronghorn (''Antilocapra americana''), is living today; all other members of the family are extinct. The living pronghorn is a small ruminant mammal resembling an antelope. Description In most respects, antilocaprids resemble other ruminants. They have a complex, four-chambered stomach for digesting tough plant matter, cloven hooves, and small, forked horns. Their horns resemble those of the bovids, in that they have a true horny sheath, but, uniquely, they are shed outside the breeding season, and subsequently regrown. Their lateral toes are even further diminished than in bovids, with the digits themselves being entirely lost, and only the cannon bones remaining. Antilocaprids have the same dental formula as most other ruminants: . Classification The antilocaprids are ruminants of the clade Pecora. Other extant pecor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merycodus
''Merycodus'' is an extinct genus of the artiodactyl family Antilocapridae. Fossils of this genus have been found in the Santa Fe Group of New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also .... Taxonomy ''Merycodus'' has had a confusing taxonomic history. The closely related ''Meryceros'' and ''Submeryceros'' are generally regarded as synonymous with ''Merycodus''. One described species known as ''Merycodus grandis'' has now been reclassified as a species of '' Prosynthetoceras''. Another former species, ''M. furcatus'' is now placed in '' Cosoryx''. Description ''Merycodus'' had relatively short horn shafts with tines of nearly equal size that were about as long as the shaft. Species traditionally included in ''Meryceros'' had horns that were generally larger and more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosoryx
''Cosoryx'' is an extinct genus of antilocaprid that lived in the Miocene of Nevada. Fossils of this genus have also been found in the Santa Fe Group in New Mexico. ''Cosoryx'' has sometimes been considered synonymous with ''Merycodus ''Merycodus'' is an extinct genus of the artiodactyl family Antilocapridae. Fossils of this genus have been found in the Santa Fe Group of New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the ...''. References Prehistoric pronghorns Miocene Artiodactyla Miocene mammals of North America Prehistoric Artiodactyla genera Fossil taxa described in 1869 {{Paleo-eventoedungulate-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merriamoceros
''Merriamoceros'' is an extinct genus of pronghorn. It is known from a single species, which is also the type species, ''M. coronatus''. Discovery and naming The type specimen (UCMP 20052) that defines this species is named ''Merriamoceros coronatus'' taking after its discoverer, J.M. Merriam. It is known from a partial skull (a single fragmentary horn or antler). Remains of ''Merriamoceros'' were found in rock formations dating to the Early Miocene period, 15.9 to 13.6 million years ago. Its type locality is Barstow, which is in a Barstovian terrestrial horizon in the Barstow Formation of California. ''Merriamoceros'' was originally named as a subspecies of ''Ramoceros'', but later J. T. Gregory elevated it to a generic level, stating that its palmate style horns were distinct characteristics and required a separate classification. The developmental series discussed by Childs Frick further supports the hypothesis of homology between the horns of ''Ramoceros'' and ''Merriamoce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subfamily
In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zoological subfamily names with "-inae". Detarioideae is an example of a botanical subfamily. Detarioideae is a subdivision of the family Fabaceae (legumes), containing 84 genera. Stevardiinae is an example of a zoological subfamily. Stevardiinae is a large subdivision of the family Characidae, a diverse clade In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach t ... of freshwater fish. See also * International Code of Nomenclature for algae, fungi, and plants * International Code of Zoological Nomenclature * Rank (botany) * Rank (zoolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merycodus Osborni
''Merycodus'' is an extinct genus of the artiodactyl family Antilocapridae. Fossils of this genus have been found in the Santa Fe Group of New Mexico. Taxonomy ''Merycodus'' has had a confusing taxonomic history. The closely related ''Meryceros'' and ''Submeryceros'' are generally regarded as synonymous with ''Merycodus''. One described species known as ''Merycodus grandis'' has now been reclassified as a species of '' Prosynthetoceras''. Another former species, ''M. furcatus'' is now placed in ''Cosoryx ''Cosoryx'' is an extinct genus of antilocaprid that lived in the Miocene of Nevada. Fossils of this genus have also been found in the Santa Fe Group in New Mexico. ''Cosoryx'' has sometimes been considered synonymous with ''Merycodus '' ...''. Description ''Merycodus'' had relatively short horn shafts with tines of nearly equal size that were about as long as the shaft. Species traditionally included in ''Meryceros'' had horns that were generally larger and more l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ungulate
Ungulates ( ) are members of the diverse clade Euungulata ("true ungulates"), which primarily consists of large mammals with Hoof, hooves. Once part of the clade "Ungulata" along with the clade Paenungulata, "Ungulata" has since been determined to be a polyphyletic and thereby invalid clade based on molecular data. As a result, true ungulates had since been reclassified to the newer clade Euungulata in 2001 within the clade Laurasiatheria while Paenungulata has been reclassified to a distant clade Afrotheria. Living ungulates are divided into two orders: Perissodactyla including Equidae, equines, rhinoceroses, and tapirs; and Artiodactyla including Bos, cattle, antelope, Sus (genus), pigs, giraffes, camels, Ovis, sheep, deer, and Hippopotamidae, hippopotamuses, among others. Cetaceans such as Whale, whales, Dolphin, dolphins, and Porpoise, porpoises are also classified as artiodactyls, although they do not have hooves. Most terrestrial ungulates use the hoofed tips of their toes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
