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Qingshania
''Qingshania'' is a genus of enigmatic eukaryote from the Chuanlinggou Formation and Gaoyuzhuang Formation of China. It contains two species, ''Qingshania magnifica'' and ''Qingshania kuanchengensis''. Description Both species have cells up to around 200 micrometers across, although ''Q. kuanchengensis'' is the only one known from complete filaments. These filaments are roughly 8 mm long, with much smaller, blunted or conical terminal cells on each end. The filaments are uniform in width or taper towards one end, with mainly cylindrical cells. These cells often lack constrictions at their interfaces in ''Q. magnifica'', and this is likely the case for ''Q. kuanchengensis'' as well. Unusually, ''Qingshania'' cells sometimes contain intracellular inclusions (or ICIs), which are likely spores due to their large size and well-defined nature. This genus seems to be within a clade of various other filamentous taxa, more specifically sharing the most similarities with the late Steni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chuanlinggou Formation
The Chuanlinggou Formation is a Formation (geology), geologic formation in China. It preserves fossils dating back to the Statherian Period (geology), period of the Paleoproterozoic. It is the first formation to preserve definitive macroscopic eukaryotes, at 1.64 billion years old. Paleobiota After Miao et al, 2024, Liu et al, 2023 and Zhongying 1986 Paleobiota References {{reflist Geologic formations of China Paleoproterozoic geology Paleoproterozoic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryote
The eukaryotes ( ) constitute the Domain (biology), domain of Eukaryota or Eukarya, organisms whose Cell (biology), cells have a membrane-bound cell nucleus, nucleus. All animals, plants, Fungus, fungi, seaweeds, and many unicellular organisms are eukaryotes. They constitute a major group of Outline of life forms, life forms alongside the two groups of prokaryotes: the Bacteria and the Archaea. Eukaryotes represent a small minority of the number of organisms, but given their generally much larger size, their collective global biomass is much larger than that of prokaryotes. The eukaryotes emerged within the archaeal Kingdom (biology), kingdom Asgard (Archaea), Promethearchaeati and its sole phylum Promethearchaeota. This implies that there are only Two-domain system, two domains of life, Bacteria and Archaea, with eukaryotes incorporated among the Archaea. Eukaryotes first emerged during the Paleoproterozoic, likely as Flagellated cell, flagellated cells. The leading evolutiona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaoyuzhuang Formation
The Gaoyuzhuang Formation is a geologic formation in China. It preserves fossils dating back to the Calymmian period of the Mesoproterozoic. It is one of the first formations to preserve definitive macroscopic eukaryotes, at almost 1.6 billion years old. In addition to this, the site preserves a diverse microbiota with various cyanobacteria and fungus-like fossils known. Paleobiota After Chen et al, 2023, Shi et al, 2017, Liu et al, 2015 and Seong-Joo & Golubic, 1999 Paleobiota In addition to these fossils, five unnamed forms are also known. Forms A and B are only known from one specimen, Form C is too fragmentary to be named, and Forms D and E bear no resemblance to any plant, prokaryote, animal or protist. However, various hyphomycetous fungi A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenian
The Stenian Period ( , from , meaning "narrow") is the final geologic period in the Mesoproterozoic Era and lasted from Mya to Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically. The name derives from narrow polymetamorphic belts formed over this period. It is preceded by the Ectasian Period and followed by the Neoproterozoic era and the Tonian period. The supercontinent Rodinia assembled during the Stenian. It would last into the Tonian period before breaking up in the Cryogenian The Cryogenian (from , meaning "cold" and , romanized: , meaning "birth") is a geologic period that lasted from . It is the second of the three periods of the Neoproterozoic era, preceded by the Tonian and followed by the Ediacaran. The Cryoge .... This period includes the formation of the Keweenawan Rift at about 1100 Mya. Fossils of the oldest known sexually reproducing organism, '' Bangiomorpha pubescens'', first appeared in the Sten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lakhanda Group
The Lakhanda Group is a group of late Mesoproterozoic The Mesoproterozoic Era is a geologic era that occurred from . The Mesoproterozoic was the first era of Earth's history for which a fairly definitive geological record survives. Continents existed during the preceding era (the Paleoproterozoic ... formations from Siberia. It contains several of the earliest eukaryotes which can be placed into modern groups, including the earliest xanthophyte algae, fungi and possibly even the first ''animals''. Paleobiota Paleobiota References {{reflist Geologic formations of Russia Mesoproterozoic geology Mesoproterozoic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruyang Group
Ruyang County () is a county in the west of Henan province, China, under the jurisdiction of the prefecture-level city of Luoyang. Ruyang County has been the site of several major discoveries of fossilized dinosaur Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic Geological period, period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the #Evolutio ... bones, including '' Huanghetitan ruyangensis'', which was first described in 2007. Administrative divisions , this county is divided to 4 towns and 9 townships. ;Towns ;Townships Climate References External linksArticle about dinosaur finds in Ruyang County [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proterozoic Life
The Proterozoic ( ) is the third of the four geologic eons of Earth's history, spanning the time interval from 2500 to 538.8 Mya, and is the longest eon of Earth's geologic time scale. It is preceded by the Archean and followed by the Phanerozoic, and is the most recent part of the Precambrian "supereon". The Proterozoic is subdivided into three geologic eras (from oldest to youngest): the Paleoproterozoic, Mesoproterozoic and Neoproterozoic. It covers the time from the appearance of free oxygen in Earth's atmosphere to just before the proliferation of complex life on the Earth during the Cambrian Explosion. The name ''Proterozoic'' combines two words of Greek origin: meaning "former, earlier", and , meaning "of life". Well-identified events of this eon were the transition to an oxygenated atmosphere during the Paleoproterozoic; the evolution of eukaryotes via symbiogenesis; several global glaciations, which produced the 300 million years-long Huronian glaciation ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleoproterozoic
The Paleoproterozoic Era (also spelled Palaeoproterozoic) is the first of the three sub-divisions ( eras) of the Proterozoic eon, and also the longest era of the Earth's geological history, spanning from (2.5–1.6 Ga). It is further subdivided into four geologic periods, namely the Siderian, Rhyacian, Orosirian and Statherian. Paleontological evidence suggests that the Earth's rotational rate ~1.8 billion years ago equated to 20-hour days, implying a total of ~450 days per year. It was during this era that the continents first stabilized. Atmosphere The Earth's atmosphere was originally a weakly reducing atmosphere consisting largely of nitrogen, methane, ammonia, carbon dioxide and inert gases, in total comparable to Titan's atmosphere. When oxygenic photosynthesis evolved in cyanobacteria during the Mesoarchean, the increasing amount of byproduct dioxygen began to deplete the reductants in the ocean, land surface and the atmosphere. Eventually all surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoproterozoic
The Mesoproterozoic Era is a geologic era that occurred from . The Mesoproterozoic was the first era of Earth's history for which a fairly definitive geological record survives. Continents existed during the preceding era (the Paleoproterozoic), but little is known about them. The continental masses of the Mesoproterozoic were more or less the same ones that exist today, although their arrangement on the Earth's surface was different. Major events and characteristics The major events of this era are the breakup of the Columbia supercontinent, the formation of the Rodinia supercontinent, and the evolution of sexual reproduction. This era is marked by the further development of continental plates and plate tectonics. The supercontinent of Columbia broke up between 1500 and 1350 million years ago, and the fragments reassembled into the supercontinent of Rodinia around 1100 to 900 million years ago, on the time boundary between the Mesoproterozoic and the subsequent Neoprot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Described In 1989
In biology, a taxon (back-formation from ''Taxonomy (biology), taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular Taxonomic rank, ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based ("Linnaean taxonomy, Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
