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Thomas Farm Site
The Thomas Farm site is an Early Miocene, Hemingfordian assemblage of vertebrate fossils located in Gilchrist County, northern Florida. The Thomas Farm site is one of the richest terrestrial deposits of Miocene vertebrates in the 18 Ma range found in eastern North America according to the Florida Museum of Natural History. The site was discovered in 1931 by Florida Geological Survey (FGS) staff member Clarence Simpson. Specimens include: amphibians, reptiles, birds, small rodents, bats, rhinoceroses, three species of three-toed horses, several artiodactyls (including camels, peccary, deer-like species and other extinct forms), as well as dogs, bears, and bear-dogs. Specimens Reptilia *Pseudemys sp. * Testudo ''(T. tedwhitei)'' * Promilio ''(P. epileus)'' * Promilio ''(P. brodkorbi)'' * Proictinia ''(P. floridana)'' *Alligator ''(A. olseni)'' * Paraoxybelis ''(P. floridanus)'' * Pseudocemophora ''(P. antiqua)'' * Anilioides ''(A. minuatus)'' * Pseudoepicrates ''(P. stanolseni) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gilchrist County Florida Exploding 600px
Gilchrist may refer to: People * Gilchrist (surname) Places * Gilchrist, Allegan County, Michigan * Gilchrist, Mackinac County, Michigan * Gilchrist, Oregon * Gilchrist, Texas * Gilchrist County, Florida Gilchrist County is a county located in the north central part of the U.S. state of Florida. Organized in 1925 from the western part of Alachua, it is the last county to be formed in the state. As of the 2020 census, the population was 17,86 ... * Gilchrist Township, Minnesota See also * {{geodis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphicyon
''Amphicyon'' ("ambiguous dog") is an extinct genus of large carnivorous bone-crushing mammals, popularly known as bear dogs, of the family Amphicyonidae, subfamily Amphicyoninae, from the Burdigalian Epoch until the late Pliocene, with the creature having bear-like and dog-like features. They ranged over North America, Europe, Asia, and Africa from 16.9 to 2.6 Ma ago, existing for approximately . Morphology ''Amphicyon'' was the typical bear-dog amphicyonid with morphology similar to both bears and dogs. With its robust build and maximum length of 2.5 m (8 ft), the largest species looked more like a bear than a dog. It had a large heavy tail, thick neck, robust limbs and teeth like a wolf. It was probably an omnivore with a lifestyle comparable to that of the brown bear. The ''Amphicyon'' was very large for predators of its time but this advantage eventually became a disadvantage because its large body mass was too large to take faster prey. ''A. major'' has been est ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daphoenus
''Daphoenus'' is an extinct genus of bear dogs. ''Daphoenus'' inhabited North America from the Middle Eocene to the Middle Miocene, 37.2—16.0 Mya, existing for approximately . Species ''D. hartshornianus'' fossils found in Oligocene Orellan rocks in the Lower Nodular Zone, Pennington County, South Dakota are dated at ~33.4 Ma. Other sites include the Prairie Dog Creek Site and Warbonnet Creek Site, Sioux County, Nebraska ~33.4 Ma., Bartlett High Site, Dawes County, Nebraska ~33.2 Ma., Babby Butte Site, Oglala Lakota County, South Dakota ~33.4 Ma—33.2 Ma. ''D. lambei'' fossils found in Eocene Duchesnean rocks at the Big Red Horizon Site, Presidio County, Texas are dated at ~38.4—38.3 Ma. Other sites include the Badwater Locality 20 Site and Wood Locality Site, Natrona County, Wyoming ~41.8 Ma., Lac Pelletier Lower Fauna Site, Saskatchewan ~42.3 Ma. ''D. ruber'' fossils were found in Oligocene Arikareean rocks in the Tecuya Canyon Formation of Kern County, California wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anchitherium
''Anchitherium'' (meaning ''near beast'') was a fossil horse with a three-toed hoof. ''Anchitherium'' was a browsing (leaf eating) horse that originated in the early Miocene of North America and subsequently dispersed to Europe and Asia,(in Chinese with English summary).MacFadden, B.J. 2001. Three-toed browsing horse ''Anchitherium clarencei'' from the early Miocene (Hemingfordian) Thomas Farm, Florida. Bulletin of the Florida Museum of Natural History, 43(3):79-109. where it gave rise to the larger bodied genus ''Sinohippus ''Sinohippus'' ("Chinese horse") is an extinct equid genus belonging to the subfamily Anchitheriinae The Anchitheriinae are an extinct subfamily of the Perissodactyla family Equidae, the same family which includes modern horses, zebras and ...''. It was around high at the shoulder, and probably represented a side-branch of horse evolution that left no modern descendants. References {{Taxonbar, from=Q542119 Miocene horses Prehistoric placen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parahippus
''Parahippus'' ("near to horse"), is an extinct equid, a relative of modern horses, asses and zebras. It lived from 24 to 17 million years ago, during the Miocene epoch. It was very similar to ''Miohippus'', but slightly larger, at around tall, at the withers. Their fossils have been found in North America, primarily in the Great Plains region and Florida. Description ''Parahippus'' was larger than ''Miohippus'', with longer legs and face. The bones in the legs were fused and this, along with muscle development, allowed ''Parahippus'' to move with forward-and-back strides. Flexible leg rotation was eliminated, so that the animal was better adapted to fast forward running on open ground without moving from side to side. Most importantly, ''Parahippus'' was able to stand on its middle toe, instead of walking on pads, which gave it the ability to run faster; its weight was supported by ligaments under the fetlock to the big central toe. Since leafy food had become scarce, thes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floridaceras
''Floridaceras'' is an extinct genus of Rhinocerotidae (rhinoceros) of the Miocene epoch (early Hemingfordian), endemic to North America, living from around ~20.6–16.3 Annum, Ma, existing for approximately . Taxonomy ''Floridaceras'' was named by Wood (1964). Its type is ''Floridaceras whitei''. It was assigned to Rhinocerotidae by Wood (1964) and Carroll (1988); and to Aceratheriinae by Prothero (1998). Fossil distribution The only site known is the Thomas Farm Site in Gilchrist County, Florida, ~20.6—16.3 Ma. Description ''Floridaceras'' was of unusually large size for a rhinoceros of the Hemingfordian. It would have been roughly comparable to a black rhinoceros in size, much larger than contemporaries such as the ''Menoceras''. Like many primitive Aceratheriines, it has no horn, relatively long limbs and brachydont dentition (indicating it was a browser). Sources Miocene rhinoceroses Miocene mammals of North America Pliocene rhinoceroses Fossil taxa described in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diceratherium
''Diceratherium'' (meaning "two horned beast") is an extinct genus of rhinoceros endemic to North America, Europe, and Asia during the Oligocene through Miocene living from 33.9 to 11.6 mya, existing for approximately . Mass estimates for the type species, ''D. armatum'' average around Taxonomy ''Diceratherium'' was named by Marsh (1875). It is not extant. Its type is ''Diceratherium armatum''. It was assigned to Rhinocerotidae by Marsh (1875) and Carroll (1988); to Diceratheriinae by Prothero (1998); to Aceratheriinae by Weidmann and Ginsburg (1999); and to Teleoceratini by Sach and Heizmann (2001).V. J. Sach and E. P. J. Heizmann. 2001. Stratigraphy and mammal faunas of the Brackwassermolasse in the surroundings of Ulm (Southwest Germany). Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie) 310:1-95 ''Diceratherium'' had two horns side by side on its nose. It lived during the Miocene Epoch The Miocene ( ) is the first geological epoch of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arenicolumba
'' Arenicolumba prattae '' is an extinct species of small pigeon from the Miocene of Florida. It was described from fossil material ( a left coracoid) collected at the Thomas Farm Site in Gilchrist County, northern Florida, south-eastern United States. The genus name ''Arenicolumba'' comes from the Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ... ''arena'' (“sandy place”) with reference to the sandy, fossiliferous sediments of the collection site, and ''columba'' (“pigeon”). Originally described in 1992 as ''Columbina prattae'', it was moved to the new genus in 2008. References Fossil taxa described in 1992 Birds described in 1992 Columbidae Miocene birds of North America Native birds of the Southeastern United States {{Paleo-bird-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phalacrocorax
''Phalacrocorax'' is a genus of fish-eating birds in the cormorant family Phalacrocoracidae. Members of this genus are also known as the Old World cormorants. Taxonomy The genus ''Phalacrocorax'' was introduced by the French zoologist Mathurin Jacques Brisson in 1760 with the great cormorant (''Phalacrocorax carbo'') as the type species. ''Phalacrocorax'' is the Latin word for a cormorant. Formerly, many other species of cormorant were classified in ''Phalacrocorax'', but most of these have been split out into different genera. A 2014 study found ''Phalacrocrax'' to be the sister genus to ''Urile'', which are thought to have split from each other between 8.9 - 10.3 million years ago. Current taxonomy A molecular phylogenetic study published in 2014 found that the genus ''Phalacrocorax'' contains 12 species. This taxonomy was adopted by the IUCN Red List and BirdLife International, and later by the IOC. Alternative taxonomies Formerly, the genus ''Phalacrocorax'' include ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
