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Liolithax
''Liolithax'' is an extinct genus of dolphin from the Middle Miocene (Serravallian) Temblor Formation of California. Taxonomy ''Liolithax kernensis'', described by Remington Kellogg Arthur Remington Kellogg (5 October 1892 – 8 May 1969) was an American naturalist and a director of the United States National Museum. His work focused on marine mammals. Early life and career Kellogg was born in Davenport, Iowa, and quic ... on the basis of the periotic CAS 4370 in 1931, was considered the only species of the genus until Barnes (1978) reassigned ''"Lophocetus" pappus'' to ''Liolithax'' based on similarities between the holotype periotic of ''L. kernensis'' and the periotic of ''L. pappus''. ''Liolithax'' was grouped in Kampholophinae with ''Kampholophos'' by Barnes (1978, 1985). The discovery of a skull from middle Miocene deposits in Baja California, Mexico cast doubt on the congenericity of ''"Lophocetus" pappus'' with the ''Liolithax'' type species by including a petros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lophocetus
''Lophocetus'' ("crested whale") is an extinct genus of dolphin belonging to the clade Delphinida that is known from late Miocene (Tortonian) marine deposits in California and Maryland. Although usually placed in Kentriodontidae, recent studies have found it only distantly related to ''Kentriodon''. Discovery and taxonomy ''Lophocetus'' was the first fossil odontocete to be described from North America. The type species, ''L. calvertensis'', was originally described as ''Delphinus calvertensis'' by the American naturalist Richard Harlan in 1842 on the basis of USNM 16314, a skull from the St. Marys Formation of Maryland. Edward Drinker Cope subsequently recognized it as distinct from extant oceanic dolphins and considered it congeneric with the franciscana (as ''Pontoporia calvertensis''), before renaming it as a distinct genus, ''Lophocetus''. In 1955, Remington Kellogg described a new species of ''Lophocetus'', ''L. pappus'', on the basis of the skull USNM 15985 from the Langhi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Miocene
The Middle Miocene is a sub-epoch of the Miocene Epoch made up of two stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene. The sub-epoch lasted from 15.97 ± 0.05 Ma to 11.608 ± 0.005 Ma (million years ago). During this period, a sharp drop in global temperatures took place. This event is known as the Middle Miocene Climate Transition. For the purpose of establishing European Land Mammal Ages The European Land Mammal Mega Zones (abbreviation: ELMMZ, more commonly known as European land mammal ages or ELMA) are zones in rock layers that have a specific assemblage of fossils (biozones) based on occurrences of fossil assemblages of Europe ... this sub-epoch is equivalent to the Astaracian age. External links GeoWhen Database - Middle Miocene .02 02 * * {{geochronology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolphin
A dolphin is an aquatic mammal within the infraorder Cetacea. Dolphin species belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and the extinct Lipotidae (baiji or Chinese river dolphin). There are 40 extant species named as dolphins. Dolphins range in size from the and Maui's dolphin to the and orca. Various species of dolphins exhibit sexual dimorphism where the males are larger than females. They have streamlined bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, some dolphins can briefly travel at speeds of per hour or leap about . Dolphins use their conical teeth to capture fast-moving prey. They have well-developed hearing which is adapted for both air and water. It is so well developed that some can survive even if they are blind. Some species are well adapted for diving to great depths. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serravallian
The Serravallian is, in the geologic timescale, an List of time periods, age or a stage (stratigraphy), stage in the middle Miocene epoch (geology), Epoch/series (stratigraphy), Series, which spans the time between 13.82 annum, Ma and 11.63 Ma (million years ago). The Serravallian follows the Langhian and is followed by the Tortonian. It overlaps with the middle of the Astaracian European Land Mammal Mega Zone, the upper Barstovian and lower Clarendonian North American Land Mammal Ages and the Laventan and lower Mayoan South American Land Mammal Ages. It is also coeval with the Sarmatian and upper Badenian Stages of the Paratethys time scale of Central and eastern Europe. Definition The Serravallian Stage was introduced in stratigraphy by the Italy, Italian geologist Lorenzo Pareto in 1865. It was named after the town of Serravalle Scrivia in northern Italy. The base of the Serravallian is at the first occurrence of fossils of the Plankton#Size groups, nanoplankton species ''Sph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temblor Formation
The Temblor Formation is a geologic formation in California. It preserves fossils dating back from the Late Oligocene to the Middle Miocene of the Neogene period. It is notable for the famous Sharktooth Hill deposit (otherwise known as Ernst Quarry). Fossils Vertebrates Cartilagenous fishes = Sharks = * '' Carcharias'' * ''Cephaloscyllium'' * ''Cetorhinus'' * †''Carcharocles megalodon'' Boessenecker, Ehret, D, Long, D, Churchill, M, Martin, E, Boessenecker, S. The Early Pliocene extinction of the mega-toothed shark ''Otodus megalodon'': a view from the eastern north Pacific. PeerJ. 2019 Feb 13;7:e6088. doi: 10.7717/peerj.6088. eCollection 2019. * †''Galeocerdo aduncus'' * †''Hemipristis serra'' * '' Heterodontus'' * ''Hexanchus'' * †'' Isurus desori'' * †'' Isurus hastalis'' * †''Isurus planus''Malchow, A. 2009. MIOCENE SHARK TOOTH HILL LOCALITY, KERN COUNTY, CALIFORNIA. Geological Society of America North-Central Section - 43rd Annual Meeting (2-3 April 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Remington Kellogg
Arthur Remington Kellogg (5 October 1892 – 8 May 1969) was an American naturalist and a director of the United States National Museum. His work focused on marine mammals. Early life and career Kellogg was born in Davenport, Iowa, and quickly dropped the name "Arthur". From a young age he devoted his free time to the study of wildlife. He built up his own small collection of mounted birds and mammals and by the time he came to choose a university he had determined he would become a naturalist. Choosing the University of Kansas as it offered courses in his chosen field, he first studied entomology, later switching to the study of mammals. From 1913 to 1916 he worked under Charles D. Bunker, the curator of birds and mammals at the university's Museum of Natural History. He published his first paper as a result of his work with Bunker. Kellogg graduated in 1915 and received his M.A. the following year. After graduating, he immediately began work with the United States Bureau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brujadelphis
''Brujadelphis'' is an extinct genus of river dolphin-like cetaceans of uncertain family placement from the Late Miocene epoch (Serravallian) of present-day Peru. The type species is ''Brujadelphis ankylorostris'', recovered from the Pisco Formation The Pisco Formation is a geologic formation located in Peru, on the southern coastal desert of Ica and Arequipa. The approximately thick formation was deposited in the Pisco Basin, spanning an age from the Middle Miocene up to the Early Pleisto ....Lambert et al., 2017 References Bibliography * Miocene cetaceans Miocene mammals of South America Serravallian life Laventan Neogene Peru Fossils of Peru Pisco Formation Fossil taxa described in 2017 {{paleo-whale-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lipotidae
Lipotidae is a family of river dolphins containing the possibly extinct baiji of China and the fossil genus ''Parapontoporia'' from the Late Miocene and Pliocene of the Pacific coast of North America. The genus '' Prolipotes'', which is based on a mandible fragment from Neogene coastal deposits in Guangxi, China, has been classified as an extinct relative of the baiji, but is dubious. The putative kentriodontid '' "Lophocetus" pappus'' is a possible relative of Lipotidae.Olivier Lambert, Giovanni Bianucci, Mario Urbina, Jonathan H. Geisler; A new inioid (Cetacea, Odontoceti, Delphinida) from the Miocene of Peru and the origin of modern dolphin and porpoise families. Zool J Linn Soc 2017; 179 (4): 919-946. doi: 10.1111/zoj.12479. https://academic.oup.com/zoolinnean/article/179/4/919/3076080/A-new-inioid-Cetacea-Odontoceti-Delphinida-from?guestAccessKey=3b956b95-d215-488a-8d90-1cff59554290#63703008 Genera and Species * †(?) '' Lipotes'' ** †(?) ''Lipotes vexillifer'' * ''Par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baiji
The baiji (; IPA: ; ''Lipotes vexillifer'', ''Lipotes'' meaning "left behind" and ''vexillifer'' "flag bearer") is a possibly extinct species of freshwater dolphin native to the Yangtze river system in China. It is thought to be the first dolphin species driven to extinction due to the impact of humans. This dolphin is listed as “critically endangered: possibly extinct” by the IUCN, has not been seen in 20 years, and several surveys of the Yangtze have failed to find it. In China, the species is also called the Chinese river dolphin, Yangtze river dolphin, Yangtze dolphin and whitefin dolphin. Nicknamed the "Goddess of the Yangtze" (), it was regarded as the goddess of protection by local fishermen and boatmen. It is not to be confused with the Chinese white dolphin (''Sousa chinensis'') or the finless porpoise (''Neophocaena phocaenoides''). The baiji population declined drastically in decades as China industrialized and made heavy use of the river for fishing, transportat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene Cetaceans
The Miocene ( ) is the first 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 is preceded by the Oligocene and is followed by 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 a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the late ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene Mammals Of North America
The Miocene ( ) is the first geological epoch of the Neogene The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya) to the beginning of the present Quaternary Period Mya. ... 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 is preceded by the Oligocene and is followed by 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 a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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