|
Constellationfish
''Valenciennellus'' is a genus of marine hatchetfishes. They are commonly known as constellationfishes. Species There are currently two recognized species in this genus: * '' Valenciennellus carlsbergi'' Bruun, 1931 * '' Valenciennellus tripunctulatus'' (Esmark ( sv), 1871) (Constellationfish) Fossils of constellationfishes are known since the Early Eocene, more than 40 million years ago The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago) .... (2002): 'Valenciennellus'' ''In:'' A compendium of fossil marine animal genera. ''Bulletins of American Paleontology'' 364: 560HTML database excerpt/ref> References Sternoptychidae Extant Eocene first appearances Marine fish genera Taxa named by David Starr Jordan Taxa named by Barton Warren Evermann Ray-finned fish genera { ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valenciennellus Carlsbergi
''Valenciennellus'' is a genus of marine hatchetfishes. They are commonly known as constellationfishes. Species There are currently two recognized species in this genus: * '' Valenciennellus carlsbergi'' Bruun, 1931 * '' Valenciennellus tripunctulatus'' (Esmark ( sv), 1871) (Constellationfish) Fossils of constellationfishes are known since the Early Eocene, more than 40 million years ago The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago). .... (2002): 'Valenciennellus'' ''In:'' A compendium of fossil marine animal genera. ''Bulletins of American Paleontology'' 364: 560HTML database excerpt/ref> References Sternoptychidae Extant Eocene first appearances Marine fish genera Taxa named by David Starr Jordan Taxa named by Barton Warren Evermann Ray-finned fish genera {{S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valenciennellus Tripunctulatus
''Valenciennellus tripunctulatus'', commonly called the constellationfish, is a species of fish in the family Sternoptychidae (hatchetfish). Description ''Valenciennellus tripunctulatus'' is small, growing no longer than . It darkens its body at night by pigment dispersion. It is silvery-white in colour with several black spots; the name ''tripunctulatus'' ("three-spotted") refers to the larger spots on their ventral surface, although there are often more than three of these. Habitat ''Valenciennellus tripunctulatus'' lives all the world's non-polar oceans. It is bathypelagic and non-migratory, living at depths of . Behaviour ''Valenciennellus tripunctulatus'' is a selective daytime feeder on copepods (mainly '' Pleuromamma'') and ostracods (such as '' Conchoecia''). It breeds year-round, with egg batches about 100–360 eggs per ovary The ovary is an organ in the female reproductive system that produces an ovum. When released, this travels down the fallopian tube into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope Carbon-13, 13C in the atmosphere was exceptionally low in comparison with the more common isotope Carbon-12, 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Popigai impact structure, Siberia and in what is now ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Starr Jordan
David Starr Jordan (January 19, 1851 – September 19, 1931) was the founding president of Stanford University, serving from 1891 to 1913. He was an ichthyologist during his research career. Prior to serving as president of Stanford University, he had served as president of Indiana University from 1884 to 1891. Starr was also a strong supporter of eugenics, and his published views expressed a fear of "race-degeneration" and asserted that cattle and human beings are "governed by the same laws of selection". He was an antimilitarist since he believed that war killed off the best members of the gene pool, and he initially opposed American involvement in World War I. Early life and career Jordan was born in Gainesville, New York, and grew up on a farm in upstate New York. His parents made the unorthodox decision to educate him at a local girls' high school. His middle name, Starr, does not appear in early census records, and was apparently self-selected; he had begun using ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barton Warren Evermann
Barton Warren Evermann (October 24, 1853 – September 27, 1932) was an American ichthyologist. Early life and education Evermann was born in Monroe County, Iowa in 1853. His family moved to Indiana while he was still a child and it was there that he grew up, completed his education, and married. Evermann graduated from Indiana University in 1886. Career For 10 years, he served as teacher and superintendent of schools in Indiana and California. While teaching in Carroll County, Indiana Evermann met fellow teacher Meadie Hawkins. They married on October 24, 1875 and had a son, Toxaway Bronte (born 1879) and a daughter, Edith (born). He was professor of biology at the Indiana State University in Terre Haute from 1886 to 1891. He lectured at Stanford University in 1893–1894, at Cornell University in 1900–1903, and at Yale University in 1903–1906. In the early 20th century, as director of the California Academy of Sciences in San Francisco, he promoted resear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sternoptychidae
The marine hatchetfishes or deep-sea hatchetfishes as well as the related bottlelights, pearlsides and constellationfishes are small deep-sea ray-finned fish of the stomiiform family Sternoptychidae. They are not closely related to and should not be confused with the freshwater hatchetfishes, which are teleosts in the characiform family Gasteropelecidae. The Sternoptychidae have 10 genera and about 70 species altogether.Nelson (2006): p.209 The scientific name means "''Sternoptyx''-family", from ''Sternoptyx'' (the type genus) + the standard animal family suffix "-idae". The type genus derives from Ancient Greek ''stérnon'' (στέρνον, "breast") + ''ptýx'' (πτύξ, "a fold/crease") + Latin ''forma'' ("external form"), the Greek part in reference to the thorax shape of marine hatchetfishes. Description and ecology Found most often at depths of 200–600 meters in tropical, subtropical and temperate waters of the Atlantic, Pacific and Indian Oceans, marine hatchetfishes ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anton Frederik Bruun
Anton Frederik Bruun (14 December 1901 – 13 December 1961) was a Danish oceanographer and ichthyologist. Educated at University of Copenhagen (1926) and employed at the Danish Commission for Marine Research (Kommissionen for Danmarks Fiskeri- og Havundersøgelser), where he participated in the third Dana expedition (1928-1930). From 1938 employed at the Zoological Museum of Copenhagen University. In 1945-46 scientific leader of the Atlantide expedition along the coast of West Africa and in 1950-1952 scientific leader of the Galathea deep-sea expedition, which circumnavigated the world. He became the first president of the Intergovernmental Oceanographic Commission, under UNESCO and was a leading figure in establishing international organisations for the exploration of the seas. The R/V ''Anton Bruun'' (former US presidential yacht ) was named after him, as was the underwater bioacoustic research facility " Station Oceanographique Anton Bruun", in Strib, Denmark ) , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laurits Martin Esmark
Laurits is a masculine given name, a Danish and Estonian variant of the Scandinavian Lauritz, related to the English names Laurence and Lawrence. It may refer to: *Laurits, fire god related to St. Lawrence in Estonian mythology Given name * Hans Laurits Olsen Hammerstad (1840after 1877), Norwegian politician * Laurits Grønland (18871957), Norwegian politician * Laurits Jørgensen (1896after 1920), Danish track and field athlete who competed in the 1920 Summer Olympics * Laurits Larsen (18721949), Danish sport shooter who competed in the 1912 and 1920 Summer Olympics * (born 1960), Estonian astronomer, director of Tartu Observatory * Laurits Munch-Petersen (born 1973), Danish film director * Laurits Andersen Ring (18541933), Danish painter known as L. A. Ring * Laurits Clausen Scabo (15621626), Lutheran Bishop of Stavanger 160526 * Laurits S. Swenson (18651947), American diplomat * Laurits Tørnæs (born 1936), Danish politician * Laurits Tuxen (18531927), Danish painter and scul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Eocene
In the geologic timescale the Ypresian is the oldest age or lowest stratigraphic stage of the Eocene. It spans the time between , is preceded by the Thanetian Age (part of the Paleocene) and is followed by the Eocene Lutetian Age. The Ypresian is consistent with the lower Eocene. Events The Ypresian Age begins during the throes of the Paleocene–Eocene Thermal Maximum (PETM). The Fur Formation in Denmark, the Messel shales in Germany, the Oise amber of France and Cambay amber of India are of this age. The Eocene Okanagan Highlands are an uplands subtropical to temperate series of lakes from the Ypresian. Stratigraphic definition The Ypresian Stage was introduced in scientific literature by Belgian geologist André Hubert Dumont in 1850. The Ypresian is named after the Flemish city of Ypres in Belgium (spelled ''Ieper'' in Dutch). The definitions of the original stage were totally different from the modern ones. The Ypresian shares its name with the Belgian Ieper Group (French: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Million Years Ago
The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago). Together they make a reference system, one to a quantity, the other to a particular place in a year numbering system that is ''time before the present''. Myr is deprecated in geology, but in astronomy ''Myr'' is standard. Where "myr" ''is'' seen in geology it is usually "Myr" (a unit of mega-years). In astronomy it is usually "Myr" (Million years). Debate In geology a debate remains open concerning the use of ''Myr'' (duration) plus ''Ma'' (million years ago) versus using only the term ''Ma''. In either case the term '' Ma'' is used in geology literature conforming to ISO 31-1 (now ISO 80000-3) and NIST 811 recommended practices. Traditional style geology literature is written The "ago" is implied, so that any such year number "X Ma" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.gif "Click for more on -> Sternoptychidae")
