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Formosibittacus
''Formosibittacus'' is an extinct genus of hangingfly in the family Bittacidae and containing a single species ''Formosibittacus macularis''. The species is known only from the Middle Jurassic Jiulongshan Formation, part of the Daohugou Beds, near the village of Daohugou in Ningcheng County, northeastern China. History and classification ''Formosibittacus macularis'' is known only from one fossil, the holotype, specimen numbers "CNU-M-NN2007001-1" and "CNU-M-NN2007001-2" for the part and counterpart respectively. The specimen is composed of an almost complete specimen of unidentified sex and is preserved as a compression fossil in sedimentary rock. The fossil was recovered from outcrops of the Jiulongshan Formation exposed in the Wuhua Township by Fang Liang. The type specimen is currently preserved in the Key Lab of Insect Evolution & Environmental Changes collections housed in the Capital Normal University, located in Beijing, China. ''Formosibittacus'' was first stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mongolbittacus
''Mongolbittacus'' is an extinct genus of hangingfly in the family Bittacidae and containing a monotypic, single species ''Mongolbittacus daohugoensis''. The species is known only from the Middle Jurassic Jiulongshan Formation, part of the Daohugou Beds, near the village of Daohugou in Ningcheng County, northeastern China. History and classification ''Mongolbittacus daohugoensis'' is known only from one fossil, the holotype, specimen number "NIGPAS 133709". The specimen is composed of an almost complete female specimen which is preserved as a two dimensional compression fossil in a well cemented calcareous grey siltstone. The fossil was recovered from outcrops of the Jiulongshan Formation exposed near Daohugou by Di-Ying Huang. The type specimen is currently preserved in the paleoentomology, geology collections housed in the Chinese Academy of Sciences, Nanjing Institute of Geology and Palaeontology, located in Nanjing, China. ''Mongolbittacus'' was first studied by Julián F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurahylobittacus
''Jurahylobittacus'' is an extinct genus of hangingfly in the family Bittacidae and containing a single species ''Jurahylobittacus astictus''. The species is known only from the Middle Jurassic Jiulongshan Formation, part of the Daohugou Beds, near the village of Daohugou in Ningcheng County, northeastern China. History and classification ''Jurahylobittacus astictus'' is known only from one fossil, the holotype, specimen numbers "CNU-M-NN2007002-1" and "CNU-M-NN2007002-2" for the part and counterpart respectively. The specimen is composed of an almost complete specimen of unidentified sex and is preserved as a compression fossil in a sedimentary rock. The fossil was recovered from outcrops of the Jiulongshan Formation exposed in the Wuhua Township by Chung-Kun Shih. The type specimen is currently preserved in the Key Lab of Insect Evolution & Environmental Changes collections housed in the Capital Normal University, located in Beijing, China. ''Jurahylobittacus'' was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haifanggou Formation
The Haifanggou Formation (), also known as the Jiulongshan Formation (), is a fossil-bearing rock deposit located near Daohugou () village of Ningcheng County, in Inner Mongolia, northeastern China. The formation consists of coarse conglomerates, sandstone, mudstone, and thin coal layers deposited in deltaic and lacustrine environments. The formation dates to the Callovian of the Middle Jurassic to the Oxfordian of the Late Jurassic. The most prominent locality of the Haifanggou Formation are the Daohugou Beds, located near the village of Daohugou in southeastern Inner Mongolia. Other localities include Wuhuaxigou, Chentaizi, Jiangzhangzi, Wubaiding, Guancaishan, Haifenggou, Fanzhangzi, and Zhuanshanzi. Dating Daohugou bed The age of the Daohugou bed has been debated, and a number of studies, using different methodologies, have reached conflicting conclusions. Various papers have placed the fossils here as being anywhere from the Middle Jurassic period (169 million ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daohugou Beds
The Haifanggou Formation (), also known as the Jiulongshan Formation (), is a fossil-bearing rock deposit located near Daohugou () village of Ningcheng County, in Inner Mongolia, northeastern China. The formation consists of coarse conglomerates, sandstone, mudstone, and thin coal layers deposited in deltaic and lacustrine environments. The formation dates to the Callovian of the Middle Jurassic to the Oxfordian of the Late Jurassic. The most prominent locality of the Haifanggou Formation are the Daohugou Beds, located near the village of Daohugou in southeastern Inner Mongolia. Other localities include Wuhuaxigou, Chentaizi, Jiangzhangzi, Wubaiding, Guancaishan, Haifenggou, Fanzhangzi, and Zhuanshanzi. Dating Daohugou bed The age of the Daohugou bed has been debated, and a number of studies, using different methodologies, have reached conflicting conclusions. Various papers have placed the fossils here as being anywhere from the Middle Jurassic period (169 million y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jiulongshan Formation
The Haifanggou Formation (), also known as the Jiulongshan Formation (), is a fossil-bearing rock deposit located near Daohugou () village of Ningcheng County, in Inner Mongolia, northeastern China. The formation consists of coarse Conglomerate (geology), conglomerates, sandstone, mudstone, and thin coal layers deposited in river delta, deltaic and lacustrine depositional environment, environments. The formation dates to the Callovian of the Middle Jurassic to the Oxfordian (stage), Oxfordian of the Late Jurassic. The most prominent locality of the Haifanggou Formation are the Daohugou Beds, located near the village of Daohugou in southeastern Inner Mongolia. Other localities include Wuhuaxigou, Chentaizi, Jiangzhangzi, Wubaiding, Guancaishan, Haifenggou, Fanzhangzi, and Zhuanshanzi. Dating Daohugou bed The age of the Daohugou bed has been debated, and a number of studies, using different methodologies, have reached conflicting conclusions. Various papers have placed the fos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hangingfly
Bittacidae is a family of scorpionflies commonly called hangingflies or hanging scorpionflies. The genus ''Bittacus'', comprising approximately 75% of all species within the family, occurs worldwide. Other genera are mostly confined to South America or Australia. Members of this family may be confused with crane flies, in the order Diptera, but can be distinguished by their two pairs of wings and lack of halteres. They are distinguished in the fact that during mating the male captures a prey insect and offers it to the female as a nuptial gift. The larger the prey item is, the more receptive the female will be to mating. Genera This list is based on ''The World Checklist of extant Mecoptera Species''. Presumably complete up to 1997, it is updated as needed. The number of species in each genus are in parentheses. A number of extinct(†) genera have been described from the fossil record. * '' Anabittacus'' (1) Kimmins, 1929 (Chile) * '' Anomalobittacus'' (1) Kimmins, 1928 (So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type (biology)
In biology, a type is a particular wiktionary:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen. A taxon is a scientifically named grouping of organisms with other like organisms, a set (mathematics), set that includes some organisms and excludes others, based on a detailed published description (for example a species description) and on the provision of type material, which is usually available to scientists for examination in a major museum research collection, or similar institution. Type specimen According to a precise set of rules laid down in the International Code of Zoological Nomenclature (ICZN) and the International Code of Nomenclature for algae, fungi, and plants (ICN), the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yixian Formation
The Yixian Formation (; formerly transcribed as Yihsien Formation) is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans the late Barremian and early Aptian stages of the Early Cretaceous. It is known for its exquisitely preserved fossils, and is mainly composed of basalts interspersed with siliciclastic sediments. History Japanese occupation The potential importance of the Yixian Formation was initially recognized during the time the Empire of Japan occupied China's Rehe ("Jehol") Province after the First battle of Hopei in 1933. Many Japanese scientists had noticed fossil remains of extinct fish and reptiles, possibly the champsosaurs. These initial fossil discoveries made by Japanese scientists vanished once World War II ended in 1945. Chinese rediscovery By 1949, when administration of the area passed to the Chinese Communist Party and its leader Mao Zedong, the fossils of Yixian were studied only by Chinese scientists. It was no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macula
The macula (/ˈmakjʊlə/) or macula lutea is an oval-shaped pigmented area in the center of the retina of the human eye and in other animals. The macula in humans has a diameter of around and is subdivided into the umbo, foveola, foveal avascular zone, fovea, parafovea, and perifovea areas. The anatomical macula at a size of is much larger than the clinical macula which, at a size of , corresponds to the anatomical fovea. The macula is responsible for the central, high-resolution, color vision that is possible in good light; and this kind of vision is impaired if the macula is damaged, for example in macular degeneration. The clinical macula is seen when viewed from the pupil, as in ophthalmoscopy or retinal photography. The term macula lutea comes from Latin ''macula'', "spot", and ''lutea'', "yellow". Structure The macula is an oval-shaped pigmented area in the center of the retina of the human eye and other animal eyes. Its center is shifted slightly away from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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