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Aokiichthys
''Aokiichthys'' is an extinct genus of basal osteoglossoid from an Early Cretaceous freshwater palaeolake of what is now Kyushu, Japan. The genus formed a species radiation in the First Formation within the Wakino Subgroup of the Kwanmon Group, as a dominant member and namesake of the '' Nipponamia''-''Aokiichthys'' fauna. The genus became extinct at the end of either the 1st Formation, or possibly during the 2nd Formation, when the palaeolake became shallower. ''Aokiichthys'' is described as being closely related to the genera '' Yungkangichthys'', and ''Paralycoptera'' (at the time of ''Aokiichthys description, all three genera were thought to be lycopterids). In their 2009 study, Xu and Chang reassess ''Paralycoptera'' to be a basal osteoglossoid, and synonymized both ''Yungkangichthys'' and ''Aokiichthys'' into ''Paralycoptera''. Etymology The generic name honors one (Mr. Tateyu) Aoki, who collected and donated the majority of the first specimens. Species ''A. toriy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paralycoptera
''Paralycoptera wui'' is an extinct species of basal osteoglossoid from Early Cretaceous freshwater environments of what is now China. ''P. wui'' was originally described as a lycopterid osteoglossomorph close to ''Lycoptera'', though, later, on the basis of several well preserved specimens, Xu and Chang (2009) reassessed it as a basal osteoglossoid on the basis of better-preserved fossil material.XU, G.-H. and CHANG, M.-M. (2009), Redescription of †Paralycoptera wui Chang & Chou, 1977 (Teleostei: Osteoglossoidei) from the Early Cretaceous of eastern China. Zoological Journal of the Linnean Society, 157: 83–106. doi: 10.1111/j.1096-3642.2009.00532.x Xu and Chang also synonymized the second described species, ''P. changi'', as well as '' Tanolepis'' and '' Yungkangichthys hsitanensis'' (while neglecting the Japanese species, ''Y. macrodon''), alleging that all of them were too similar to ''P. wui'' to merit separate generic or specific status, and that any anatomical diffe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycopteridae
''Lycopteridae'' is an extinct family of freshwater osteoglossomorph ray-finned fishes. Genera * ''Lycoptera'' Müller, 1848 * ''Aokiichthys'' Yabumoto 1994 * '' Changichthys'' Su 1991 * '' Yungkangichthys'' Chang and Chou 1974 Description These ray-finned fishes were small, often only a finger's length, with small, almost circular scales. Distribution They occurred in East Asian rivers and lakes from the Jurassic to Cretaceous. Fossils of these fishes have been found in China and Japan. References * Arno Hermann Müller: ''Lehrbuch der Paläozoologie. Band III, Vertebraten, Teil 1.'' Gustav Fischer Verlag, 1985 * Joseph S. Nelson: ''Fishes of the World ''Fishes of the World'' by the American ichthyologist Joseph S. Nelson (1937–2011) is a standard reference for fish systematics. Now in its fifth edition (2016), the work is a comprehensive overview of the diversity and classification of the ...''. John Wiley & Sons, 2006, * V.N. YakovleSystematics of the family Lycopt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hauterivian
The Hauterivian is, in the geologic timescale, an age in the Early Cretaceous Epoch or a stage in the Lower Cretaceous Series. It spans the time between 132.9 ± 2 Ma and 129.4 ± 1.5 Ma (million years ago). The Hauterivian is preceded by the Valanginian and succeeded by the Barremian.See Gradstein ''et al.'' (2004) for a detailed geologic timescale Stratigraphic definitions The Hauterivian was introduced in scientific literature by Swiss geologist Eugène Renevier in 1873. It is named after the Swiss town of Hauterive at the shore of Lake Neuchâtel. The base of the Hauterivian is defined as the place in the stratigraphic column where the ammonite genus ''Acanthodiscus'' first appears. A reference profile for the base (a GSSP) was officially ratified by the International Union of Geological Sciences in December of 2019, and is placed in La Charce, France. The top of the Hauterivian (the base of the Barremian) is at the first appearance of ammonite species ''Spitidiscus hugii'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils Of Japan
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 absol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cretaceous Fish Of Asia
{{disambiguation, geo ...
Early may refer to: History * The beginning or oldest part of a defined historical period, as opposed to middle or late periods, e.g.: ** Early Christianity ** Early modern Europe Places in the United States * Early, Iowa * Early, Texas * Early Branch, a stream in Missouri * Early County, Georgia Other uses * ''Early'' (Scritti Politti album), 2005 * ''Early'' (A Certain Ratio album), 2002 * Early (name) * Early effect, an effect in transistor physics * Early Records, a record label * the early part of the morning See also * Earley (other) Earley is a town in England. Earley may also refer to: * Earley (surname), a list of people with the surname Earley * Earley (given name), a variant of the given name Earlene * Earley Lake, a lake in Minnesota *Earley parser, an algorithm *Earley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous Bony Fish
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Ray-finned Fish Genera
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. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasphenoid
The parasphenoid is a bone which can be found in the cranium of many vertebrates. It is an unpaired dermal bone which lies at the midline of the roof of the mouth. In many reptiles (including birds), it fuses to the endochondral (cartilage-derived) basisphenoid bone of the lower braincase, forming a bone known as the parabasisphenoid. Early mammals have a small parasphenoid, but for the most part its function has been replaced by the vomer bone. The parasphenoid has been lost in placental mammals and caecilian amphibians. See also *Ossification of frontal bone *Terms for anatomical location Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position prov ... References Bones of the head and neck {{musculoskeletal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kitakyushu City
is a Cities of Japan, city located in Fukuoka Prefecture, Japan. As of June 1, 2019, Kitakyushu has an estimated population of 940,978, making it the second-largest city in both Fukuoka Prefecture and the island of Kyushu after the city of Fukuoka. It is one of Japan's 20 Cities designated by government ordinance of Japan, designated cities, one of three on Kyushu, and is divided into seven Wards of Japan, wards. Kitakyushu was formed in 1963 from a merger of municipalities centered on the historic city of Kokura, and its name literally means "North Kyushu City" in Japanese. It is located at the northernmost point of Kyushu on the Kanmon Straits, separating the island from Honshu, across from the city of Shimonoseki. Kitakyushu and Shimonoseki are connected by numerous transport links including the Kanmon Bridge and the Kanmon Tunnel (other), Kanmon Tunnels. Kitakyushu's Urban Employment Area forms part of the Fukuoka-Kitakyushu, Fukuoka-Kitakyushu Greater Metropolitan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
