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Moggridgea Rainbowi
''Moggridgea rainbowi'', also called the Australian trapdoor spider, is a small spider endemic to Kangaroo Island in South Australia. The spider was first recorded in 1919. Distribution The spider's habitat is in burrows just above the high tide mark. The spider has been identified and studied from two sites on Kangaroo Island; the genomes from the two sites 80 km apart indicate that the groups diverged 1 to 6 million years ago, reflective of juveniles not migrating far from their maternal sites. The most closely related species is considered to be the African '' M. intermedia''. A study has indicated that ''M. rainbowi'' is likely to have reached Australia from Africa between 2 and 16 million years ago. Given that this time is intermediate between the separation of Australia from Gwondwana (circa 95 million years ago) and the arrival of humans into Australia, it has been proposed that the spiders may have arrived by oceanic dispersal Oceanic dispersal is a type of bio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kangaroo Island
Kangaroo Island, also known as Karta Pintingga (literally 'Island of the Dead' in the language of the Kaurna people), is Australia's third-largest island, after Tasmania and Melville Island. It lies in the state of South Australia, southwest of Adelaide. Its closest point to the mainland is Snapper Point in Backstairs Passage, which is from the Fleurieu Peninsula. The native population of Aboriginal Australians that once occupied the island (sometimes referred to as the Kartan people) disappeared from the archaeological record sometime after the land became an island following the rising sea levels associated with the Last Glacial Period around 10,000 years ago. It was subsequently settled intermittently by sealers and whalers in the early 19th century, and from 1836 on a permanent basis during the British colonisation of South Australia. Since then the island's economy has been principally agricultural, with a southern rock lobster fishery and with tourism growing in impo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Australia
South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories by area, and second smallest state by population. It has a total of 1.8 million people. Its population is the second most highly centralised in Australia, after Western Australia, with more than 77 percent of South Australians living in the capital Adelaide, or its environs. Other population centres in the state are relatively small; Mount Gambier, the second-largest centre, has a population of 33,233. South Australia shares borders with all of the other mainland states, as well as the Northern Territory; it is bordered to the west by Western Australia, to the north by the Northern Territory, to the north-east by Queensland, to the east by New South Wales, to the south-east by Victoria, and to the south by the Great Australian Bight.M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moggridgea Intermedia
''Moggridgea'' is a genus of spiders in the tree dwelling family, Migidae. The genus was first described by Octavius Pickard-Cambridge in 1875, who named the genus after naturalist John Traherne Moggridge. The majority of the 32 species of the genus are found in southern Africa and Socotra, with an outlying species in Australia's Kangaroo Island. List of ''Moggridgea'' species * '' Moggridgea albimaculata'' Hewitt, 1925 (South Africa) * '' Moggridgea ampullata'' Griswold, 1987 (South Africa) * '' Moggridgea anactenidia'' Griswold, 1987 (Cameroon) * '' Moggridgea breyeri'' Hewitt, 1915 (South Africa) * '' Moggridgea clypeostriata'' Benoit, 1962 (Congo) * '' Moggridgea crudeni'' Hewitt, 1913 (South Africa) * '' Moggridgea dyeri'' O. P.-Cambridge, 1875 (South Africa) * '' Moggridgea eremicola'' Griswold, 1987 (Namibia) * '' Moggridgea intermedia'' Hewitt, 1913 (South Africa) * '' Moggridgea leipoldti'' Purcell, 1903 (South Africa) * ''Moggridgea loistata'' Griswold, 1987 (South ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceanic Dispersal
Oceanic dispersal is a type of biological dispersal that occurs when terrestrial organisms transfer from one land mass to another by way of a sea crossing. Island hopping is the crossing of an ocean by a series of shorter journeys between islands, as opposed to a single journey directly to the destination. Often this occurs via large rafts of floating vegetation such as are sometimes seen floating down major rivers in the tropics and washing out to sea, occasionally with animals trapped on them. Dispersal via such a raft is sometimes referred to as a rafting event. Colonization of land masses by plants can also occur via long-distance oceanic dispersal of floating seeds. History Rafting has played an important role in the colonization of isolated land masses by mammals. Prominent examples include Madagascar, which has been isolated for ~120 million years ( Ma), and South America, which was isolated for much of the Cenozoic. Both land masses, for example, appear to have received ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Migidae
Migidae, also known as tree trapdoor spiders, is a family of spiders with about 100 species in eleven genera. They are small to large spiders with little to no hair and build burrows with a trapdoor. Some species live in tree fern stems. They have a Gondwanan distribution, found almost exclusively on the Southern Hemisphere, occurring in South America, Africa, Madagascar, Australia, New Zealand and New Caledonia. Genera , the World Spider Catalog accepts the following genera: *''Bertmainius'' Harvey, Main, Rix & Cooper, 2015 — Australia *''Calathotarsus'' Simon, 1903 — Chile, Argentina *''Goloboffia'' Griswold & Ledford, 2001 — Chile *'' Heteromigas'' Hogg, 1902 — Australia *'' Mallecomigas'' Goloboff & Platnick, 1987 — Chile *''Micromesomma'' Pocock, 1895 — Madagascar *''Migas'' L. Koch, 1873 — New Zealand, Australia *''Moggridgea'' O. Pickard-Cambridge, 1875 — Africa, Australia, Yemen *''Paramigas'' Pocock, 1895 — Madagascar *''Poecilomigas'' Simon, 1903 — ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiders Of Australia
Australia has a number of highly venomous spiders, including the Sydney funnel-web spider, its relatives in the family Hexathelidae, and the redback spider, whose bites can be extremely painful and have historically been linked with deaths in medical records. Most Australian spiders do not have venom that is considered to be dangerously toxic. No deaths caused by spider bites in Australia have been substantiated by a coronial inquest since 1979. There are sensationalised news reports regarding Australian spiders that fail to cite evidence. ''A Field Guide to Spiders of Australia'' published by CSIRO Publishing in 2017 featuring around 836 species illustrated with photographs of live animals, around 381 genera and 78 families, introduced significant updates to taxonomy from Ramirez, Wheeler and Dmitrov Estimates put the total number of Australian spider species at about 10,000. Only around 3,600 have been described. Little information is known about many undiscovered species. New s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
