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Novumbra
''Novumbra'' is a genus of mudminnows (family Umbridae) native to Oregon and Washington state, USA. Molecular data suggests that this genus is more closely related to ''Esox'' than ''Dallia'' and ''Umbra''. ''Novumbra'' diverged from ''Esox'' roughly 65 million years ago in the Paleocene The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), E .... Species Two species in this genus are recognized: *'' Novumbra hubbsi'' L. P. Schultz, 1929 (Olympic mudminnow) *†'' Novumbra oregonensis'' Cavender, 1969 References {{Taxonbar, from=Q7065124 Umbridae Ray-finned fish genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Novumbra Oregonensis
''Novumbra oregonensis'' is an extinct species of mudminnow from Oregon, USA. All fossils have been found in the lower member of the John Day Formation; the type specimens were found in the Knox Ranch leaf locality, and additional paratypes were found in the Bridge Creek flora locality. Similar to other mudminnows, its habitat would have been heavily vegetated waters, based on the presence of leaf imprints accompanying the fossils. ''Novumbra oregonensis'' differs from the only other member of the genus, the Olympic mudminnow The Olympic mudminnow (''Novumbra hubbsi'') is a fish native to the western lowlands of Washington: the Chehalis River basin, Deschutes River basin, and some Olympic Peninsula basins. It grows to 8 cm (about 3 in) in length, and is Was ..., by a larger head (the skull of the former goes into the standard length 3 times, while the latter's head goes into the standard length 3.5 times), and a significantly longer lower jaw. The pelvic, anal, and p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Novumbra Hubbsi
The Olympic mudminnow (''Novumbra hubbsi'') is a fish native to the western lowlands of Washington: the Chehalis River basin, Deschutes River basin, and some Olympic Peninsula basins. It grows to 8 cm (about 3 in) in length, and is Washington's only known endemic freshwater fish species. Although they strongly resemble killifish, mudminnows are more closely related to pike and muskellunge. The Olympic mudminnow is the only living species in the genus ''Novumbra'', and one of eight living species worldwide in the paraphyletic family Umbridae. It predominantly resides in darkly stained tannic waters in the lower levels of lentic ecosystems, although may be found in clearwater swamps, and feeds on fish larvae, eggs, but more often small invertebrates. It prefers areas with mudbeds and dense vegetation, and has a remarkable tolerance for low oxygen levels. The Olympic mudminnow is listed as a sensitive species by the state of Washington. Although many populations are found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonard Peter Schultz
Leonard Peter Schultz (1901–1986) was an American ichthyologist. Biography Schultz was born in 1901, at Albion, Michigan. He received education on ichthyology at Albion College, in which he got his bachelor's degree, in 1924. In 1926, he got his master's degree from the University of Michigan, and then in 1932 from the University of Washington. From 1928 till 1936, he taught at the College of Fisheries at University of Washington. He was appointed as an assistant curator at the Division of Fishes of the United States National Museum. During the same year he joined Smithsonian Institution, where he remained till retirement in 1968. In 1938 he became a curator of the Division. While in retirement, he continued to work as a Research Associate of the Division of Fishes. He was one of the scientists that was sent to work for the U.S. Navy, on Operation Crossroads, that was conducted at the Bikini Atoll in 1946. Aside from testing an atomic bomb during the operation, he also col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umbridae
Umbridae is a family of fish in the order Esociformes, which contains pike, pickerel, and mudminnows. The single living genus, ''Umbra'', occupies weed-choked freshwater habitats in eastern North America and eastern Europe. While the family traditionally contained the genera ''Umbra'', '' Novumbra'', and ''Dallia'', recent genetic and paleontological research have recovered this grouping as paraphyletic, with ''Novumbra'' and ''Dallia'' being moved to the family Esocidae. Distribution Umbridae contains three extant species, all within the genus ''Umbra'': ''Umbra pygmaea'', ''Umbra limi'', and ''Umbra krameri''. ''U. pygmaea'' can be found across the eastern United States and southeastern Canada. ''U. limi'' ranges throughout the Great Lakes region and Mississippi River basin of North America. ''U. krameri'' can be found in the Danube and Dniester River basins of Europe. ''Umbra ''spp. are most commonly found in the Atlantic coast regions of North America, along the marshy, l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Esox
''Esox'' is a genus of freshwater fish commonly known as pike or pickerel. It is the type genus of the family Esocidae. The type species of the genus is ''Esox lucius'', the northern pike. ''Esox'' has been present in Laurentia (which later became North America) and Eurasia since the Paleocene. Modern large pike species are native to the Palearctic and Nearctic realms, ranging across Northern America and from Western Europe to Siberia in North Asia. Pikes have the elongated, torpedo-like shape typical of predatory fishes, with sharply pointed heads and sharp teeth. Their coloration is typically grey-green with a mottled or spotted appearance with stripes along their backs, providing camouflage among underwater weeds, and each individual pike marking patterns are unique like fingerprints. Pikes can grow to a maximum recorded length of , reaching a maximum recorded weight of . Etymology The generic name ''Esox'' (pike fish) derives from the Greek ἴσοξ (''ee-soks'', a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dallia
''Dallia'' is a genus of mudminnows native to Russia and Alaska. Molecular data indicates the genus is more closely related to ''Esox'' and ''Novumbra'' than ''Umbra.'' ''Dallia'' diverged from ''Novumbra'' + ''Esox'' approximately 66 million years ago. Species Three species in this genus are recognized: ''Dallia admirabilis'' Chereshnev, 1980 (Amguema blackfish) ''Dallia delicatissima'' Smitt, 1881 (Pilkhykay blackfish) ''Dallia pectoralis The Alaska blackfish (''Dallia pectoralis'') is a species of freshwater fish in the esocid family ( Esocidae) of order Esociformes. It inhabits Arctic regions of Alaska as well as Siberia and the Bering Sea islands. Description Alaska blackfish ...'' T. H. Bean, 1880 (Alaska blackfish) Mitochondrial sequence data was examined from ''D. pectoralis'' and ''D. admirabilis'' and did not indicate that speciation within the genus in Russia; however, genetic isolation within Alaska for populations of ''D. pectoralis'' could be high and as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umbra (fish)
''Umbra'' is a genus of mudminnows native to Europe and North America. Species The currently recognized species in this genus are: * ''Umbra krameri'' Walbaum, 1792 (European mudminnow) * ''Umbra limi'' ( Kirtland, 1840) (central mudminnow) * ''Umbra pygmaea The eastern mudminnow (''Umbra pygmaea'') is a species of freshwater fish belonging to the family Umbridae. It is native to eastern North America, but has been introduced to Europe. It feeds primarily on insect larvae and other small aquatic in ...'' ( DeKay, 1842) (eastern mudminnow) References Umbridae Freshwater fish genera Taxa named by Wilhelm Heinrich Kramer {{esociformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleocene
The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by Chicxulub impact, an asteroid impact and possibly volcanism, marked the beginning of the Paleocene and killed off 75% of living species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Pal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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