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Vetulocystis Catenata
''Vetulocystis'' is an extinct genus of vetulocystids. It was found in remains of Shankou, in Anning (Cambrian of China). Approximately 541 Ma. Phylogeny See also *Vetulicola ''Vetulicola'' is an extinct genus of marine animal from the Cambrian of China. It is the eponymous member of the enigmatic phylum Vetulicolia, which is of uncertain affinities but may belong to the deuterostomes. Description The type species ... References Vetulocystidae Cambrian genus extinctions {{cambrian-animal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cambrian
The Cambrian Period ( ; sometimes symbolized Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million years ago (mya) to the beginning of the Ordovician Period mya. Its subdivisions, and its base, are somewhat in flux. The period was established as "Cambrian series" by Adam Sedgwick, who named it after Cambria, the Latin name for 'Cymru' (Wales), where Britain's Cambrian rocks are best exposed. Sedgwick identified the layer as part of his task, along with Roderick Murchison, to subdivide the large "Transition Series", although the two geologists disagreed for a while on the appropriate categorization. The Cambrian is unique in its unusually high proportion of sedimentary deposits, sites of exceptional preservation where "soft" parts of organisms are preserved as well as their more resistant shells. As a result, our understanding of the Cambrian bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cathaymyrus Diadexus
''Cathaymyrus'' is a genus of Early Cambrian cephalochordate known from the Chengjiang locality in Yunnan Province, China. Both species have a long segmented body with no distinctive head. The segments resemble the v-shaped muscle blocks found in similar cephalochordates such as '' Amphioxus''. A long linear impression runs along the "back" of the body looking something like a chordate notochord. ''Cathaymyrus'' is related to '' Pikaia'', another cephalochordate from the Burgess Shale. See also * Maotianshan shales *''Haikouichthys'' *''Myllokunmingia ''Myllokunmingia'' is a genus of basal chordate from the Lower Cambrian Maotianshan shales of China 518 to 490 mya and is thought to be a vertebrate, although this is not conclusively proven. The species M. fengjiaoa is 28 mm long and 6&nbs ...'' References {{Taxonbar, from=Q19890829 Cambrian chordates Maotianshan shales fossils Cephalochordata Prehistoric chordate genera Cambrian genus extinctions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have 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 bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinode ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deuterostomia
Deuterostomia (; in Greek) are animals typically characterized by their anus forming before their mouth during embryonic development. The group's sister clade is Protostomia, animals whose digestive tract development is more varied. Some examples of deuterostomes include vertebrates (and thus humans), sea stars, and crinoids. In deuterostomy, the developing embryo's first opening (the blastopore) becomes the anus, while the mouth is formed at a different site later on. This was initially the group's distinguishing characteristic, but deuterostomy has since been discovered among protostomes as well. This group is also known as enterocoelomates, because their coelom develops through enterocoely. The three major clades of deuterostomes are Chordata (e.g. vertebrates), Echinodermata (e.g. starfish), and Hemichordata (e.g. acorn worms). Together with Protostomia and their out-group Xenacoelomorpha, these compose the Bilateria, animals with bilateral symmetry and three germ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinodermata
An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Adult echinoderms are found on the sea bed at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are the largest entirely marine phylum. The first definitive echinoderms appeared near the start of the Cambrian. The echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the biotic desert of the deep sea, as well as shallower oceans. Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb. Geolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vetulocystida
Vetulocystidae is the only family of the taxon Vetulocystida, which is a group of extinct deuterostomes of uncertain phylogenetic position. Vetulocystidae is made up of the genera ''Vetulocystis'', '' Dianchicystis'' and '' Thylacocercus''. Features The body consists of a voluminous thecal-shaped section (similar to the outer shape of the pterobranchs), where there are two cone-shaped structures (anterior and posterior) and a lenticular respiratory organ; and another small section attached to the substrate. The anterior cone-shaped structure is believed to have constituted the mouth, due to its similarity to other primitive echinoderms (such as stylophoids and blastoids); while the posterior structure (similar to that of the cystoids and eocrinoids) fulfilled the functions of anus and gonopore. Furthermore, and unlike many other echinoderms, these animals lacked a calcified skeleton. Paleoecology They were probably sessile, although it is possible that the part attached to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vetulocystidae
Vetulocystidae is the only family of the taxon Vetulocystida, which is a group of extinct deuterostomes of uncertain phylogenetic position. Vetulocystidae is made up of the genera ''Vetulocystis'', ''Dianchicystis'' and '' Thylacocercus''. Features The body consists of a voluminous thecal-shaped section (similar to the outer shape of the pterobranchs), where there are two cone-shaped structures (anterior and posterior) and a lenticular respiratory organ; and another small section attached to the substrate. The anterior cone-shaped structure is believed to have constituted the mouth, due to its similarity to other primitive echinoderms (such as stylophoids and blastoids); while the posterior structure (similar to that of the cystoids and eocrinoids) fulfilled the functions of anus and gonopore. Furthermore, and unlike many other echinoderms, these animals lacked a calcified skeleton. Paleoecology They were probably sessile, although it is possible that the part attached to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burqin Shankou Dam
The Burqin Shankou Dam () is an arch dam in Burqin County of Xinjiang Uighur Autonomous Region of China. The Burqin Shankou Dam is constructed in the narrow gorge of the Burqin, a right tributary of the Irtysh, in the area where it leaves the Altai Mountains for the Irtysh plain. This is a concrete arch dam 94 m tall; the dam (measured along its curved top) is 311.5 m long and 10 m wide at the top, and 27 m wide at the bottom. The dam creates a reservoir with the volume of 0.221 cubic km; the dam's hydroelectric plant will eventually generate 220 Megawatt of power. The construction work started in July 2009. In September 2014 the last of the concrete was poured on the dam and it began to impound its reservoir. The reservoir was filled by 30 April 2015 and the first generator was commissioned on 5 November 2015. This dam creates a reservoir with a flooded area of 3.9 km2 and power density of 28.2W/m2. The dam also has a water release structure, a water intake system, a p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anning District
Anning District () is one of 5 districts of the prefecture-level city of Lanzhou, the capital of Gansu Province, Northwest China. It forms part of the urban core of Lanzhou. The district was established in 1953 and is named after a former Ming dynasty fort.http://www.lzanning.gov.cn/art/2018/7/10/art_12002_653438.html It is known for having numerous peach orchards, since the Ming dynasty it has thus been nicknamed the '10- li peach county' (). Administrative divisions Anning District is divided to 8 subdistricts. ;Subdistricts Education The district is the home of several educational institutes: * Northwest Normal University * Lanzhou Jiaotong University * Gansu Agricultural University * Gansu College of Political Science and Law * Lanzhou City College * Gansu Provincial Party School * Gansu Academy of Agricultural Sciences * Gansu Academy of Social Sciences The Lanzhou Botanical Garden is also located in the district. References See also * List of administrative divisions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambrian
The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million years ago (mya) to the beginning of the Ordovician Period mya. Its subdivisions, and its base, are somewhat in flux. The period was established as "Cambrian series" by Adam Sedgwick, who named it after Cambria, the Latin name for 'Cymru' (Wales), where Britain's Cambrian rocks are best exposed. Sedgwick identified the layer as part of his task, along with Roderick Murchison, to subdivide the large "Transition Series", although the two geologists disagreed for a while on the appropriate categorization. The Cambrian is unique in its unusually high proportion of sedimentary deposits, sites of exceptional preservation where "soft" parts of organisms are preserved as well as their more resistant shells. As a result, our understanding of the Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dianchicystis
''Dianchicystis'' is an basal extinct genus of vetulocystids. It was found in Jianshan, near Haikou, Qiongzhusi Fm. (Cambrian from China). Phylogeny See also *''Haikouichthys ''Haikouichthys'' is an extinct genus of craniate (animals with notochords and distinct heads) that lived 518 million years ago, during the Cambrian explosion of multicellular life. ''Haikouichthys'' had a defined skull and other characteristic ...'' References Vetulocystidae Cambrian genus extinctions {{cambrian-animal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
