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Diegoaelurus
''Diegoaelurus'' ("San Diego's cat") is a Extinction, extinct genus of mammals from the extinct subfamily Machaeroidinae within extinct family Oxyaenidae. This genus currently contains only one species ''Diegoaelurus vanvalkenburghae'', found in the Santiago Formation, California, Santiago Formation in California. This mammal lived during the Uintan stage of the Eocene, Middle Eocene Epoch around 46.2 to 39.7 million years ago. Etymology The name of genus ''Diegoaelurus'' comes from city San Diego and . ''Diegoaelurus vanvalkenburghae'' was named after Dr. Blaire Van Valkenburgh in honor of her research on carnivorous mammals and saber-toothed predator paleoecology. Description ''Diegoaelurus vanvalkenburghae'' was small in stature, with a size comparable to a Fossa (animal), fossa. The holotype fossils (SDSNH 38343) consists of a mandible and well preserved dentition. Its discovery has made paleontologists question whether this group's extinction was caused due to the Eocene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machaeroidinae
Machaeroidinae ("dagger-like") is a Family (biology), subfamily of extinct carnivorous Saber-toothed cat, sabre-toothed Placentalia, placental mammals from Asia and North America.Malcolm C. McKenna, Susan K. Bell: ''Classification of Mammals: Above the Species Level'' in Columbia University Press, New York (1997), 631 Seiten. Traditionally classified as Hyaenodonta, hyaenodonts, this group is now classified as a member of the family Oxyaenidae. Classification and phylogeny Taxonomy * Subfamily: †Machaeroidinae (Matthew, 1909) ** Genus: †''Apataelurus'' (Scott, 1937) *** †''Apataelurus kayi'' (Scott, 1937) *** †''Apataelurus pishigouensis'' (Tong & Lei, 1986) ** Genus: †''Diegoaelurus'' (Zack, Poust & Wagner, 2022) *** ''Diegoaelurus vanvalkenburghae'' (Zack, Poust & Wagner, 2022) ** Genus: †''Isphanatherium'' (Lavrov & Averianov, 1998) *** ''Isphanatherium ferganensis'' (Lavrov & Averianov, 1998) ** Genus: †''Machaeroides'' (Matthew, 1909) *** †''Machaeroides eot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santiago Formation, California
The Santiago Formation is a geologic formation in Orange and northwestern San Diego County, California. The siltstones, mudstones and sandstones of the formation preserve fossils of '' Walshina esmaraldensis'' and '' Diegoaelurus vanvalkenburghae'', dating back to the Late Eocene to Late Oligocene periods (Uintan to Duchesnean in the NALMA classification). at .org Depositional environment The only paleoenvironmental interpretation based exclusively on specimens from the Santiago Formation is a study of land snails from SDSNH locality 3276 (Member C,[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxyaenidae
Oxyaenidae ("sharp hyenas") is a family of extinct carnivorous placental mammals. Traditionally classified in order Creodonta, this group is now classified in its own order Oxyaenodonta ("sharp tooth hyenas") within clade Pan-Carnivora in mirorder Ferae. The group contains four subfamilies comprising fourteen genera. Oxyaenids were the first to appear during the late Paleocene in North America, while smaller radiations of oxyaenids in Europe and Asia occurred during the Eocene. Etymology The name of order Oxyaenodonta comes , name of hyena genus ''Hyaena'' and . The name of family Oxyaenidae comes , name of hyena genus ''Hyaena'' and taxonomic suffix ":wikt:-idae#Suffix, -idae". Description They were superficially cat-like mammals that plantigrade, walked on flat feet, in contrast to modern cats, which digitigrade, walk and run on their toes. Anatomically, characteristic features include a short, broad skull, deep jaws, and teeth designed for crushing rather than shearing, as in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machaeroides
''Machaeroides'' ("dagger-like") is a genus of sabre-toothed predatory mammal that lived during the Eocene (54.9 to 46.2 mya). Its fossils were found in the U.S. state of Wyoming. Description Both species bore a passing or superficial resemblance to a very small, dog-sized saber-toothed cat. ''Machaeroides'' could be distinguished from actual saber-toothed cats by their more-elongated skulls, and their plantigrade stance. ''Machaeroides'' species are distinguished from the closely related '' Apataelurus'' by the fact that the former genus had smaller saber-teeth. Despite its small size, the genus ''Machairoides'' was well-equipped to hunt prey larger than itself, such as the small, primitive horses and rhinoceroses present at the time, as it was equipped with saber teeth and powerful forelimbs to subdue prey. ''M. eothen'' weighed an estimated , thus matching in size a small Staffordshire Terrier. ''M. simpsoni'' was probably smaller. Taxonomic placement Its position within the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museum
A museum ( ; plural museums or, rarely, musea) is a building or institution that cares for and displays a collection of artifacts and other objects of artistic, cultural, historical, or scientific importance. Many public museums make these items available for public viewing through exhibits that may be permanent or temporary. The largest museums are located in major cities throughout the world, while thousands of local museums exist in smaller cities, towns, and rural areas. Museums have varying aims, ranging from the conservation and documentation of their collection, serving researchers and specialists, to catering to the general public. The goal of serving researchers is not only scientific, but intended to serve the general public. There are many types of museums, including art museums, natural history museums, science museums, war museums, and children's museums. According to the International Council of Museums (ICOM), there are more than 55,000 museums in 202 countrie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decades
A decade () is a period of ten years. Decades may describe any ten-year period, such as those of a person's life, or refer to specific groupings of calendar years. Usage Any period of ten years is a "decade". For example, the statement that "during his last decade, Mozart explored chromatic harmony to a degree rare at the time" merely refers to the last ten years of Wolfgang Amadeus Mozart's life without regard to which calendar years are encompassed. Also, 'the first decade' of a person's life begins on the day of their birth and ends at the end of their 10th year of life when they have their 10th birthday; the second decade of life starts with their 11th year of life (during which one is typically still referred to as being "10") and ends at the end of their 20th year of life, on their 20th birthday; similarly, the third decade of life, when one is in one's twenties or 20s, starts with the 21st year of life, and so on, with subsequent decades of life similarly described by ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean. Because it is on the North American Plate, North American Tectonic Plate, Greenland is included as a part of North America geographically. North America covers an area of about , about 16.5% of Earth's land area and about 4.8% of its total surface. North America is the third-largest continent by area, following Asia and Africa, and the list of continents and continental subregions by population, fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 579 million people in List of sovereign states and dependent territories in North America, 23 independent states, or about 7.5% of the world's population. In Americas (terminology)#Human ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utah
Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to its west by Nevada. Utah also touches a corner of New Mexico in the southeast. Of the fifty U.S. states, Utah is the 13th-largest by area; with a population over three million, it is the 30th-most-populous and 11th-least-densely populated. Urban development is mostly concentrated in two areas: the Wasatch Front in the north-central part of the state, which is home to roughly two-thirds of the population and includes the capital city, Salt Lake City; and Washington County in the southwest, with more than 180,000 residents. Most of the western half of Utah lies in the Great Basin. Utah has been inhabited for thousands of years by various indigenous groups such as the ancient Puebloans, Navajo and Ute. The Spanish were the first Europe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene–Oligocene Extinction Event
The Eocene–Oligocene extinction event, also called the Eocene-Oligocene transition or ''Grande Coupure'', is the transition between the end of the Eocene and the beginning of the Oligocene, an extinction event and faunal turnover occurring between 33.9 and 33.4 million years ago marked by large-scale extinction and floral and faunal turnover (although minor in comparison to the largest mass extinctions). Most of the affected organisms were marine or aquatic in nature. They included the last of the ancient ungulates, the "condylarths". This was a time of major climatic change, especially cooling, not clearly caused by any single major impact or volcanic event. Extended volcanic activity is one possible cause. Another speculation points to several large meteorite impacts near this time, including those of the Chesapeake Bay crater and the Popigai impact structure of central Siberia, which scattered debris perhaps as far as Europe. New dating of the Popigai meteor strengthens it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Diego County, California
San Diego County (), officially the County of San Diego, is a county in the southwestern corner of the U.S. state of California. As of the 2020 census, the population was 3,298,634, making it California's second-most populous county and the fifth-most populous in the United States. Its county seat is San Diego, the second-most populous city in California and the eighth-most populous city in the United States. It is the southwesternmost county in the 48 contiguous United States, and is a border county. It is also home to 18 Native American tribal reservations, the most of any county in the United States. San Diego County comprises the San Diego-Chula Vista-Carlsbad, CA Metropolitan Statistical Area, which is the 17th most populous metropolitan statistical area and the 18th most populous primary statistical area of the United States as of July 1, 2012. San Diego County is also part of the San Diego–Tijuana transborder metropolitan area, the largest metropolitan area shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceanside, California
Oceanside is a city on the South Coast (California), South Coast of California, located in San Diego County, California, San Diego County. The city had a population of 167,086 at the 2010 United States Census, 2010 census. The city is a popular tourist destination, owing to its historic landmarks, beaches, and architecture. Oceanside's origins date to 1798, when the Spanish founded the village of San Luis Rey, Oceanside, California, San Luis Rey with the establishment of Mission San Luis Rey de Francia by Fermín de Lasuén. During the Spanish period, Mission San Luis Rey grew to be the largest of all the Spanish missions in California, Californian missions, but following the Mexican secularization act of 1833 the mission and its community declined. Following the Conquest of California, U.S. conquest of California, the former mission lands were developed into an oceanfront resort and the community's name gradually changed to Oceanside. History Originally inhabited by Native A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypercarnivore
A hypercarnivore is an animal which has a diet that is more than 70% meat, either via active predation or by scavenging. The remaining non-meat diet may consist of non-animal foods such as fungi, fruits or other plant material. Some extant examples of hypercarnivorous animals include crocodilians, owls, shrikes, eagles, vultures, felids, most wild canids, dolphins, snakes, spiders, scorpions, mantises, marlins, groupers, piranhas and most sharks. Every species in the family Felidae, including the domesticated cat, is a hypercarnivore in its natural state. Additionally, this term is also used in paleobiology to describe taxa of animals which have an increased slicing component of their dentition relative to the grinding component. Hypercarnivores need not be apex predators. For example, salmon are exclusively carnivorous, yet they are prey at all stages of life for a variety of organisms. Many prehistoric mammals of the clade Carnivoramorpha (Carnivora and Miacoidea without C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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