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Maldybulakia
''Maldybulakia'' is a genus of freshwater arthropod which lived during the Devonian period. ''Maldybulakia'' is known from three species, ''M. angusi'' and ''M. malcolmi'' from Australia, and ''M. mirabilis'' from Kazakhstan. Although it was originally described as a myriapod-like animal, it was later considered related to the xiphosurans, a group including modern horseshoe crabs. Discovery and etymology In 1992, the type species of ''Maldybulakia'' is described from the Pragian to Emsian-aged Sheshen'karinskaya Formation (also known as the Sheshenkarinskoy Suite) in central Kazakhstan, with scientific name ''Lophodesmus mirabilis''. The genus name ''Lophodesmus'' came from the Greek ''lophos'' ("tubercle") and ''desmos'' ("bond"), and the species name ''mirabilis'' means "wonderful" in Latin. However, this genus name is already used for an extant genus of myriapod, and in 1998, the new genus name ''Maldybulakia'', named after Maldybulak Farm in the Bayanaul District, Pavl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xiphosura
Xiphosura () is an order of arthropods related to arachnids. They are more commonly known as horseshoe crabs (a name applied more specifically to the only extant family, Horseshoe crab, Limulidae). They first appeared in the Hirnantian (Late Ordovician). Currently, there are only four living species. Xiphosura contains one suborder, Xiphosurida, and several stem-genera. The group has hardly changed in appearance in hundreds of millions of years; the modern horseshoe crabs look almost identical to prehistoric genera and are considered to be living fossils. The most notable difference between ancient and modern forms is that the abdominal segments in present species are fused into a single unit in adults. Xiphosura were historically placed in the class Merostomata, although this term was intended to encompass also the Eurypterida, eurypterids, whence it denoted what is now known to be an unnatural (paraphyletic) group (although this is a grouping recovered in some recent cladistic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pavlodar Region
Pavlodar Region ( kk, Павлодар облысы, translit=Pavlodar oblysy; russian: Павлодарская область, translit=Pavlodarskaya oblast) is a region of Kazakhstan. The population of the region was and ; the latest official estimate (as at the start of 2018) was 754,739. Its capital is the city of Pavlodar, which had a population of 360,014 at the start of 2018. Many people, especially Ukrainians, migrated to Pavlodar in Nikita Khrushchev's Virgin Lands Campaign. The Bayanaul National Park, a protected area of the Kazakh Uplands, is located in the Bayanaul Range, within 100 km of Ekibastuz. Geography Pavlodar borders Russia (Altai Krai, Omsk Oblast and Novosibirsk Oblast) to the north, and also borders the following Kazakh regions: Akmola (to the west), East Kazakhstan (to the south-east), North Kazakhstan (to the north-west), and Karaganda (to the south). The Irtysh River flows from the Altay Mountains in China to Russia through the region; the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalon (arthropod Head)
The cephalon is the head section of an arthropod. It is a tagma, i.e., a specialized grouping of arthropod segments. The word cephalon derives from the Greek κεφαλή (kephalē), meaning "head". Insects In insects, ''head'' is a preferred term. The insect head consists of five segments, including three (the labial, maxillary and mandibular) necessary for food uptake, which are altogether known as the gnathocephalon and house the suboesophageal ganglion of the brain, as well as the antennal segment, and an ocular segment, as well as a non segmented fused section of the head where the archicerebrum is housed known as the acron. See also arthropod head problem. Chelicerates and crustaceans In chelicerates and crustaceans, the cephalothorax is derived from the fusion of the cephalon and the thorax, and is usually covered by a single unsegmented carapace. In relation with the arthropod head problem, phylogeny studies show that members of the Malacostraca class of cru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
20200928 Willwerathia Laticeps
9 (nine) is the natural number following and preceding . Evolution of the Arabic digit In the beginning, various Indians wrote a digit 9 similar in shape to the modern closing question mark without the bottom dot. The Kshatrapa, Andhra and Gupta started curving the bottom vertical line coming up with a -look-alike. The Nagari continued the bottom stroke to make a circle and enclose the 3-look-alike, in much the same way that the sign @ encircles a lowercase ''a''. As time went on, the enclosing circle became bigger and its line continued beyond the circle downwards, as the 3-look-alike became smaller. Soon, all that was left of the 3-look-alike was a squiggle. The Arabs simply connected that squiggle to the downward stroke at the middle and subsequent European change was purely cosmetic. While the shape of the glyph for the digit 9 has an ascender in most modern typefaces, in typefaces with text figures the character usually has a descender, as, for example, in . The mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terrestrial Animal
Terrestrial animals are animals that live predominantly or entirely on land (e.g. cats, dogs, ants, spiders), as compared with aquatic animals, which live predominantly or entirely in the water (e.g. fish, lobsters, octopuses), and amphibians, which rely on a combination of aquatic and terrestrial habitats (e.g. frogs and newts). Some groups of insects are terrestrial, such as ants, butterflies, earwigs, cockroaches, grasshoppers and many others, while other groups are partially aquatic, such as mosquitoes and dragonflies, which pass their larval stages in water. Terrestrial animals tend to be more developed and intelligent than aquatic animals. Terrestrial classes The term "terrestrial" is typically applied to species that live primarily on the ground, in contrast to arboreal species, which live primarily in trees. There are other less common terms that apply to specific groups of terrestrial animals: *Saxicolous creatures are rock dwelling. "Saxicolous" is derived from t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycopodiopsida
Lycopodiopsida is a class of vascular plants known as lycopods, lycophytes or other terms including the component lyco-. Members of the class are also called clubmosses, firmosses, spikemosses and quillworts. They have dichotomously branching stems bearing simple leaves called microphylls and reproduce by means of spores borne in sporangia on the sides of the stems at the bases of the leaves. Although living species are small, during the Carboniferous, extinct tree-like forms formed huge forests that dominated the landscape and contributed to coal deposits. The nomenclature and classification of plants with microphylls varies substantially among authors. A consensus classification for extant (living) species was produced in 2016 by the Pteridophyte Phylogeny Group (PPG I), which places them all in the class Lycopodiopsida, which includes the classes Isoetopsida and Selaginellopsida used in other systems. (See Table 2.) Alternative classification systems have used ranks fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diplosegments
Millipedes are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derived from this feature. Each double-legged segment is a result of two single segments fused together. Most millipedes have very elongated cylindrical or flattened bodies with more than 20 segments, while pill millipedes are shorter and can roll into a tight ball. Although the name "millipede" derives from the Latin for "thousand feet", no species was known to have 1,000 or more until the discovery of ''Eumillipes persephone'', which can have over 1,300 legs. There are approximately 12,000 named species classified into 16 orders and around 140 families, making Diplopoda the largest class of myriapods, an arthropod group which also includes centipedes and other multi-legged creatures. Most millipedes are slow-moving detritivores, eating decaying leaves and other dead plant matter. Some eat fungi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angus Young
Angus McKinnon Young (born 31 March 1955) is an Australian musician, best known as the co-founder, lead guitarist, songwriter, and only remaining original member of the hard rock band AC/DC. He is known for his energetic performances, schoolboy-uniform stage outfits and his own version of Chuck Berry's duckwalk. Young was ranked 24th in ''Rolling Stone''s 100 greatest guitarists of all-time list. In 2003, Young and the other members of AC/DC were inducted into the Rock and Roll Hall of Fame. Early life In the 1950s, Young's father, William Young (1911–1985), his mother, Margaret (1913–1988; maiden name also Young), and his elder seven siblings lived at 6 Skerryvore Road in the Cranhill district of Glasgow in Scotland. Cranhill was a tough, working-class suburb with high unemployment. Prior to moving to Cranhill, William worked first as a wheel boy in a rope works and then as a machine/saw operator in an asbestos/cement business. In 1940 William joined the Royal Air Forc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malcolm Young
Malcolm Mitchell Young (6 January 1953 – 18 November 2017) was an Australian musician who was the co-founder, rhythm guitarist, backing vocalist and songwriter of AC/DC. Except for a brief absence in 1988, he was with the band from its beginning in 1973 until retiring in 2014 due to health reasons. As a member of AC/DC, he was inducted into the Rock and Roll Hall of Fame in 2003. Though his younger brother Angus was the more visible of the brothers, Malcolm was described as the driving force and the leader of the band. In 2014, Young stated that despite his retirement from the band, AC/DC was determined to continue making music with his blessing. Young left AC/DC in mid-2014 to receive treatment for dementia. In September 2014, the band's management announced that he would be retiring permanently. He died from the effects of dementia on 18 November 2017. Early life Young's father, William Young (1911–1985), lived with his family at 6 Skerryvore Road in the Cranhill distr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frasnian
The Frasnian is one of two faunal stages in the Late Devonian Period. It lasted from million years ago to million years ago. It was preceded by the Givetian Stage and followed by the Famennian Stage. Major reef-building was under way during the Frasnian Stage, particularly in western Canada and Australia. On land, the first forests were taking shape. In North America, the Antler orogeny peaked, which were contemporary with the Bretonic phase of the Variscan orogeny in Europe. The Frasnian coincides with the second half of the "charcoal gap" in the fossil record, a time when atmospheric oxygen levels were below 13 percent, the minimum necessary to sustain wildfires. North American subdivisions of the Frasnian include * West Falls Group * Sonyea Group * Genesee Group Name and definition The Frasnian Stage was proposed in 1879 by French geologist Jules Gosselet Jules-Auguste Gosselet (19 April 1832 – 20 March 1916) was a French geologist born in Cambrai, France. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Givetian
The Givetian is one of two faunal stages in the Middle Devonian Period. It lasted from million years ago to million years ago. It was preceded by the Eifelian Stage and followed by the Frasnian Stage. It is named after the town of Givet in France. The oldest forests occurred during the late Givetian. The lower GSSP is located at Jebel Mech Irdane, Tafilalt, Morocco. Name and definition The Givetian Stage was proposed in 1879 by French geologist Jules Gosselet Jules-Auguste Gosselet (19 April 1832 – 20 March 1916) was a French geologist born in Cambrai, France. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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