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Kentriodontidae
Kentriodontidae is an extinct family of odontocete whales related to modern dolphins. The Kentriodontidae lived from the Oligocene to the Pliocene before going extinct. Taxonomy Kentriodontids have been variously divided into three or four subfamilies: Kampholophinae, Kentriodontinae, Lophocetinae, and Pithanodelphinae. However, recent cladistic studies have recovered Kentriodontidae as paraphyletic. Pyenson ND Vélez-Juarbe J Gutstein CS Little H Vigil D O’Dea A . 2015. Isthminia panamensis, a new fossil inioid (Mammalia, Cetacea) from the Chagres Formation of Panama and the evolution of ‘river dolphins’ in the Americas. PeerJ 3: e1227.O. Lambert, G. Bianucci, M. Urbina and J. H. Geisler. 2017. A new inioid (Cetacea, Odontoceti, Delphinida) from the Miocene of Peru and the origin of modern dolphin and porpoise families. Zoological Journal of the Linnean Society 179:919-946. For instance, ''"Lophocetus" pappus'' may be a close relative of Lipotidae, '' "Delphinodon" dividu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kentriodon
''Kentriodon'' is an extinct genus of Odontoceti, toothed whale related to modern-day dolphins. Fossils have been found in North America, Europe and Japan. Several species have been described. Description ''Kentriodon'' was the most diverse of all the Kentriodontidae, kentriodontids, which are represented by seventeen described genera. These were small to medium-sized odontocetes with largely symmetrical skulls, and thought likely to include ancestors of some modern species. ''Kentriodon'' is also the oldest described kentriodontid genus, reported from the Late Oligocene to the Middle Miocene. Kentriodontines ate small fish and other nectonic organisms; they are thought to have been active Animal echolocation, echolocators, and might have formed pods. The diversity, morphology and distribution of fossils appear parallel to some modern species. Species * ''Kentriodon pernix'' Kellogg, 1927 (type species, type) * ''Kentriodon fuchsii'' (Brandt, 1873) * ''Kentriodon hobetsu'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadrodelphis
''Hadrodelphis'' is an extinct genus of dolphin once assigned to the paraphyletic/polyphyletic family Kentriodontidae. Remains have been found in the middle Miocene (Langhian) Calvert Formation of United States. Taxonomy ''Harodelphis'' is similar to '' Macrokentriodon'' in its larger size and its large tooth diameter.S. D. Dawson. 1996. A description of the skull and postcrania of Hadrodelphis calvertense Kellog 1966, and its position within the Kentriodontidae (Cetacea; Delphinoidea). Journal of Vertebrate Paleontology 16(1):125-134. Despite being traditionally assigned to Kentriodontidae, recent cladistic analyses have recovered it along with ''Macrokentriodon'' in a clade with '' Kampholophos'' as sister to crown Delphinida and more derived than ''Kentriodon ''Kentriodon'' is an extinct genus of Odontoceti, toothed whale related to modern-day dolphins. Fossils have been found in North America, Europe and Japan. Several species have been described. Description ''Kentrio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wimahl
''Wimahl'' is a genus of cetacean that belongs to the family Kentriodontidae. It lived in the Miocene period. It contains a single species, ''Wimahl chinookensis''. The name ''Wimahl'' translates to "big river" in the local Chinook language. Discovery There is one known specimen. It includes a complete skull, some vertebrae, and parts of both flippers, and is labelled as UWBM 88078. It was found in 2003 near the north bank of the Columbia River The Columbia River (Upper Chinook: ' or '; Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river rises in the Rocky Mountains of British Columbia, C ..., in the state of Washington. References Prehistoric toothed whales {{paleo-whale-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Macrokentriodon
''Macrokentriodon'' is an extinct genus of giant dolphin once assigned to the paraphyletic/polyphyletic family Kentriodontidae. Remains have been found in the late Miocene (Serravallian) Choptank Formation of United States. ''Macrokentriodon'' is similar to ''Hadrodelphis'' in its larger size and its large tooth diameter. Despite being traditionally assigned to Kentriodontidae, recent cladistic analyses have recovered it along with ''Hadrodelphis'' in a clade with '' Kampholophos'' as sister to crown Delphinida and more derived than ''Kentriodon ''Kentriodon'' is an extinct genus of Odontoceti, toothed whale related to modern-day dolphins. Fossils have been found in North America, Europe and Japan. Several species have been described. Description ''Kentriodon'' was the most diverse ...'' and '' Rudicetus''.Post K, Louwye S, Lambert O. (2017) Scaldiporia vandokkumi, a new pontoporiid (Mammalia, Cetacea, Odontoceti) from the Late Miocene to earliest Pliocene of the Westers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tagicetus
''Tagicetus'' is an extinct genus of dolphin belonging to the polyphyletic family Kentriodontidae. Although classified in the subfamily Kentriodontinae by Lambert et al. (2005), recent cladistic analysis places it as closer to extant delphinoids than to ''Kentriodon ''Kentriodon'' is an extinct genus of Odontoceti, toothed whale related to modern-day dolphins. Fossils have been found in North America, Europe and Japan. Several species have been described. Description ''Kentriodon'' was the most diverse ...''.Post K, Louwye S, Lambert O. (2017) Scaldiporia vandokkumi, a new pontoporiid (Mammalia, Cetacea, Odontoceti) from the Late Miocene to earliest Pliocene of the Westerschelde estuary (The Netherlands) PeerJ 5:e3991 https://doi.org/10.7717/peerj.3991 References Prehistoric toothed whales Prehistoric cetacean genera Fossil taxa described in 2005 {{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] |
Prehistoric Toothed Whales
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Age. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligocene Cetaceans
The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain. The name Oligocene was coined in 1854 by the German paleontologist Heinrich Ernst Beyrich from his studies of marine beds in Belgium and Germany. The name comes from the Ancient Greek (''olígos'', "few") and (''kainós'', "new"), and refers to the sparsity of extant forms of molluscs. The Oligocene is preceded by the Eocene Epoch and is followed by the Miocene Epoch. The Oligocene is the third and final epoch of the Paleogene Period. The Oligocene is often considered an important time of transition, a link between the archaic world of the tropical Eocene and the more modern ecosystems of the Miocene. Major changes during the Oligocene included a global expansion ... [...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] |
