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Arthromygalidae
The Arthromygalidae are an extinct family of arachnids, possibly spiders. Fossils placed in the family were all found in the Carboniferous, . They were considered by Alexander Petrunkevitch to be "mesotheles", i.e. placed in the spider suborder Mesothelae. Petrunkevitch used the family for Carboniferous fossils he regarded as mesotheles but which lacked eyes (those with eyes were placed in the Arthrolycosidae). Paul A. Selden has shown the fossil specimens only have "the general appearance of spiders", with segmented abdomens (opisthosomae), but no definite spinnerets. Genera Genera placed in the Arthromygalidae are shown below, together with the location of the fossils. * †'' Arthromygale'' Petrunkevitch, 1923 – Rakovník (Czech Republic) * †'' Eolycosa'' Kušta, 1885 – Rakovník * †'' Geralycosa'' Kušta, 1888 – Rakovník * †'' Kustaria'' Petrunkevitch, 1953 – Rakovník * †'' Palaranea'' Frič, 1873 – Czech Republic * †'' Protocteniza'' Petrunkevitch, 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider Families
Spider taxonomy is that part of taxonomy that is concerned with the science of naming, defining and classifying all spiders, members of the Araneae order of the arthropod class Arachnida with more than 48,500 described species. However, there are likely many species that have escaped the human eye to this day, and many specimens stored in collections waiting to be described and classified. It is estimated that only one third to one half of the total number of existing species have been described. Arachnologists currently divide spiders into two suborders with about 129 families. Due to constant research, with new species being discovered every month and others being recognized as synonyms, the number of species in the families is bound to change and only reflects the present state of knowledge. Nevertheless, the species numbers given here are useful as a guideline – see the table of families at the end of the article. History Spider taxonomy can be traced to the work of Swed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesothelae
The Mesothelae are a suborder of spiders (order Araneae) that includes a single extant family, Liphistiidae, and a number of extinct families. This suborder is thought to form the sister group to all other living spiders, and to retain ancestral characters, such as a segmented abdomen with spinnerets in the middle and two pairs of book lungs. Members of Liphistiidae are medium to large spiders with eight eyes grouped on a tubercle. They are found only in China, Japan, and southeast Asia. The oldest known Mesothelae spiders are known from the Carboniferous, over 300 million years ago. The Heptathelidae were once considered their own family; today they are considered a subfamily of the Liphistiidae. Description Members of Mesothelae have paraxial chelicerae, two pairs of coxal glands on the legs, eight eyes grouped on a nodule, two pairs of book lungs, and no endites on the base of the pedipalp. Most have at least seven or eight spinnerets near the middle of the abdomen. Lateral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider
Spiders ( order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every land habitat. , 50,356 spider species in 132 families have been recorded by taxonomists. However, there has been debate among scientists about how families should be classified, with over 20 different classifications proposed since 1900. Anatomically, spiders (as with all arachnids) differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical pedicel, however, as there is currently neither paleontological nor embryological evidence that spiders ever had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleozoic Arachnids
The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ''zōḗ'' (), "life", meaning "ancient life" ). It is the longest of the Phanerozoic eras, lasting from , and is subdivided into six geologic periods (from oldest to youngest): # Cambrian # Ordovician # Silurian # Devonian # Carboniferous # Permian The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era. The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. The Cambrian witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared. Arthropods, molluscs, fish, amphibians, reptiles, and synapsids all evolved during the Paleozoic. Life began in the ocean but even ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cévennes
, etymology= , photo=Point Sublime-Gorges du Tarn-Frankreich.jpg , photo_caption=The Gorges du Tarn , country= France , subdivision2= , subdivision2_type=Départements , parent= Massif Central , area_km2= , length_km= , length_orientation= , width_km= , width_orientation= , highest=Mont Lozère , elevation_m= 1702 , coordinates= , map_image=MC cevenes.jpg , map_caption=Location in the Massif Central The Cévennes ( , ; oc, Cevenas) is a cultural region and range of mountains in south-central France, on the south-east edge of the Massif Central. It covers parts of the ''départements'' of Ardèche, Gard, Hérault and Lozère. Rich in geographical, natural, and cultural significance, portions of the region are protected within the Cévennes National Park, the Cévennes Biosphere Reserve (UNESCO), as well as a UNESCO World Heritage Site: Causses and the Cévennes, Mediterranean agro-pastoral Cultural Landscape. The area has been inhabited since 400,000 BCE ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silesia
Silesia (, also , ) is a historical region of Central Europe that lies mostly within Poland, with small parts in the Czech Republic and Germany. Its area is approximately , and the population is estimated at around 8,000,000. Silesia is split into two main subregions, Lower Silesia in the west and Upper Silesia in the east. Silesia has a diverse culture, including architecture, costumes, cuisine, traditions, and the Silesian language (minority in Upper Silesia). Silesia is along the Oder River, with the Sudeten Mountains extending across the southern border. The region contains many historical landmarks and UNESCO World Heritage Sites. It is also rich in mineral and natural resources, and includes several important industrial areas. The largest city and Lower Silesia's capital is Wrocław; the historic capital of Upper Silesia is Opole. The biggest metropolitan area is the Upper Silesian metropolitan area, the centre of which is Katowice. Parts of the Czech city of Ostrav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Ferdinand Von Roemer
Carl Ferdinand von Roemer (5 January 1818 – 14 December 1891), German geologist, had originally been educated for the legal profession at Göttingen, but became interested in geology, and abandoning law in 1840, studied science at the University of Berlin, where he graduated Ph.D. in 1842. Two years later he published his first work, ''Das Rheinische Ubergangsgebirge'' (1844), in which he dealt with the older rocks and fossils. In 1845 he paid a visit to America, and devoted a year and a half to a careful study of the geology of Texas and other Southern states. He published at Bonn in 1849 a general work entitled ''Texas'', while the results of his investigations of the Cretaceous rocks and fossils were published three years later in a treatise, ''Die Kreidebildungen von Texas und ihre organischen Einschlusse'' (1852), which also included a general account of the geology, and gained for him the title Father of the geology of Texas. Subsequently, he published at Breslau ''Di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coseley
Coseley ( ) is a village in the north of the Dudley Metropolitan Borough, in the English West Midlands. Part of the Black Country, it is situated approximately north of Dudley itself, on the border with Wolverhampton. Though it is a part of Dudley for statistical and administrative purposes, it is divided between the Bilston and Tipton postal districts, and mostly falls within the Wolverhampton South-East Electoral district, parliamentary constituency. History Coseley was originally a village in the ancient Manorialism, manor of Sedgley. In 1867, it joined with Brierley and Ettingshall to break away from the parish of Sedgley and formed Lower Sedgley Local Board District. In 1875, the name was changed to Coseley Local Board District by order of the Council and, in 1895, became Coseley Urban District. At this stage, most of the Coseley area was occupied by industrial and agricultural land; it was known during this time for its Carboniferous fossils. Coseley Urban District C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
