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Dabeigou
The Dabeigou Formation is a palaeontological formation located in Hebei, China.Dabeigou Formation at .org It dates from the mid to of the |
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] |
Chresmoda
''Chresmoda'' is an extinct genus of insects within the family Chresmodidae. Description ''Chresmoda'' are large enigmatic insects with very long specialized legs, probably adapted for skating on the water surface similar to pond skaters. They can reach a body length of about , with a forewing length of about . Some lagre specimens could reached a size of about . These Polyneoptera of uncertain position have been considered aquatic and living on the water surface, probably predaceous on nektonic small animals. They lived during the Cretaceous of Brazil, China, Lebanon, Spain, United Kingdom, Mongolia and Myanmar, as well as in the Late Jurassic of Germany, from 150.8 to 94.3 Ma from the Tithonian to the Cenomanian ages. While most species are known from compression fossils, ''Chresmoda chikuni'' is known from well preserved 3-dimensional specimens in amber. Species *''Chresmoda aquatica'' Martinez-Delclos, 1989 La Pedrera de Rubies Formation and Las Hoyas, Spain, Barremian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jinguofortis
''Jinguofortis'' is a genus of primitive avialan (bird) belonging to the clade Pygostylia that lived during the Valanginian stage of the Early Cretaceous. It was found in the Dabeigou Formation in northeastern China, and isotope dating from the samples overlying the bird-bearing horizon is 127 million years ago. Description ''Jinguofortis'' is notable for having a combination of primitive and advanced traits. Some of these are typical of stemward avialans (further from modern birds) while others occur in crownward avialans (closer to modern birds). The scapula and coracoid bones of the shoulder girdle are fused into a single bone, the scapulocoracoid. A fused scapulocoracoid is a plesiomorphic (primitive) feature which is not present in modern birds. This plesiomorphic state is found in pterosaurs and non-avian dinosaurs, including coelurosaurian theropods ancestral to birds. However, these bones become unfused in the famed early avialan ''Archaeopteryx'', and in more c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eoconfuciusornis
''Eoconfuciusornis'' a genus of extinct avialan that lived 131 Ma ago, in the Early Cretaceous of China. The type species of ''Eoconfuciusornis'', ''Eoconfuciusornis zhengi'', was named and described by Zhang Fucheng, Zhou Zhonghe and Michael Benton in 2008. The generic name combines a Greek ἠώς, ''eos'', "dawn", with the name of the related genus ''Confuciusornis''. The specific name honours Zheng Guangmei. The holotype, specimen IVPP V11977, was found near Sichakou in Fengning in Hebei province. Its provenance the Sichakou Beds are part of the Dabeigou Formation which was seen by the describers as dating to the Hauterivian, and were thought to be about 131 million years old. The specimen consists of a compressed skeleton that is relatively complete and shows well conserved remains of most of the feathering. ''Eoconfuciusornis'' was somewhat smaller than ''Confuciusornis'', but otherwise very similar with a pointed toothless beak. Compared to the latter it had longer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valanginian
In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 139.8 ± 3.0 Ma and 132.9 ± 2.0 Ma (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretaceous and precedes the Hauterivian Stage of the Lower Cretaceous. Stratigraphic definitions The Valanginian was first described and named by Édouard Desor in 1853. It is named after Valangin, a small town north of Neuchâtel in the Jura Mountains of Switzerland. The base of the Valanginian is at the first appearance of calpionellid species '' Calpionellites darderi'' in the stratigraphic column. A global reference section (a GSSP) had in 2009 not yet been appointed. The top of the Valanginian (the base of the Hauterivian) is at the first appearance of the ammonite genus '' Acanthodiscus''. Subdivision The Valanginian is often subdivided in Lower and Upper substages. The Upper substage begins at the first appearance of ammonite speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
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 Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glypta
''Glypta'' is a genus of parasitoid wasps belonging to the family Ichneumonidae. Species include: * '' Glypta albanica'' * '' Glypta abbreviata'' Dasch, 1988 * '' Glypta abrupta'' Dasch, 1988 * '' Glypta acares'' Momoi, 1965 * '' Glypta accentuata'' Dasch, 1988 * '' Glypta aclerivora'' Dasch, 1988 * '' Glypta adachii'' Uchida, 1928 * '' Glypta adornata'' Dasch, 1988 * '' Glypta aequorea'' Dasch, 1988 * '' Glypta alameda'' Dasch, 1988 * '' Glypta alaskensis'' Dasch, 1988 * '' Glypta albanica'' Habermehl, 1926 * '' Glypta alberta'' Dasch, 1988 * '' Glypta albifaciens'' Dasch, 1988 * '' Glypta albilineata'' Dasch, 1988 * ''Glypta albitibia'' Dasch, 1988 * '' Glypta albonotata'' Dasch, 1988 * '' Glypta algida'' Dasch, 1988 * '' Glypta alpestris'' Dasch, 1988 * '' Glypta altamirai'' Godoy & Gauld, 2002 * '' Glypta alternata'' Dasch, 1988 * '' Glypta amabilis'' Dasch, 1988 * '' Glypta ambigua'' Dasch, 1988 * '' Glypta amoena'' Dasch, 1988 * '' Glypta angelica'' Dasch, 1988 * '' Glypta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
