|
Melanatria
''Madagasikara'' is a genus of tropical freshwater snails with an operculum, aquatic gastropod molluscs in the family Pachychilidae. The generic name ''Madagasikara'' is from the Malagasy language and means "Madagascar". This genus is endemic to Madagascar. Nomenclature In systematic literature before 2010 the name ''Melanatria'' Bowdich, 1822 was generally used for this group. Another name, which was used particularly in earlier taxonomic literature of the 19th century is ''Pirena'' Lamarck, 1799. However, it has been shown that both names are not available for this genus. The name ''Melanatria'' is a nomen dubium, not based on a recognizable species while the name ''Pirena'' is a junior synonym of ''Faunus'' Born, 1758, which is a different genus within the family Pachychilidae. Therefore, introduction of a new name, ''Madagasikara'', was required to maintain a stable taxonomy. Species Species within the genus ''Madagasikara '' include: * ''Madagasikara johnsoni'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagasikara Spinosa
''Madagasikara spinosa'' is a species of tropical freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Pachychilidae.Köhler, F. & Glaubrecht, M. (2010). "Uncovering an overlooked radiation: molecular phylogeny and biogeography of Madagascar’s endemic river snails (Caenogastropoda: Pachychilidae: ''Madagasikara'' gen. nov.). ''Biological Journal of the Linnean Society'' 99: 867-894. ''Madagasikara spinosa'' is the type species of the genus '' Madagasikara''. Distribution This species is endemic to Madagascar. It was recorded in East Madagascar and in surrounding islands such as Île Sainte-Marie. The type locality is "Dans le rivières de l’ile de Madagascar", in rivers of Madagascar. Description The shell is elongate and large and it has 5.0-11.0 whorls. The color of the shell is from brown to black. The apex is truncated. There are axial ribs especially on upper whorls. The aperture is widely oval with palatal and basal s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagasikara Madagascariensis
''Madagasikara madagascarensis'' s a species of tropical freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Pachychilidae.Köhler, F. & Glaubrecht, M. (2010). "Uncovering an overlooked radiation: molecular phylogeny and biogeography of Madagascar’s endemic river snails (Caenogastropoda: Pachychilidae: ''Madagasikara'' gen. nov.). ''Biological Journal of the Linnean Society'' 99: 867-894. This species is endemic to Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa .... Description References Pachychilidae Gastropods described in 1840 Taxonomy articles created by Polbot Endemic fauna of Madagascar {{Pachychilidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagasikara Johnsoni
''Madagasikara johnsoni'' is a species of tropical freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Pachychilidae.Köhler, F. & Glaubrecht, M. (2010). "Uncovering an overlooked radiation: molecular phylogeny and biogeography of Madagascar’s endemic river snails (Caenogastropoda: Pachychilidae: ''Madagasikara'' gen. nov.). '' Biological Journal of the Linnean Society'' 99: 867-894. Distribution This species is endemic to Madagascar. The only precisely known locality is in Ankara Sontsitra National Park, West Madagaskar. The type locality was given as " River Kamony, in the north-west of the island", but the thereabouts of this locality has not been exactly determined. The most detailed version of the type locality is that of the Kamoro River drainage in Mahajanga Province, north-west Madagascar. Description ''Madagasikara johnsoni'' was originally discovered and described (under the name ''Melanatria johnsoni'') by Edgar Alber ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of Madagascar
The non-marine molluscs of Madagascar are a part of the molluscan fauna of Madagascar ( wildlife of Madagascar). In tropical rainforests of Madagascar, there is high diversity of species of terrestrial gastropods and many species has low population density, so many of them are "extremely rare". About 50% of land snails in Madagascar are related to land snails in Africa. Freshwater gastropods Pachychilidae the genus '' Madagasikara'' is endemic to Madagascar, 5 species * '' Madagasikara spinosa'' (Lamarck, 1822) – the previously used name ''Melanatria fluminea'' being not valid, endemic * ''Madagasikara madagascariensis'' ( Grateloup, 1840) – endemic * ''Madagasikara johnsoni'' (E. A. Smith, 1882) – endemic * ''Madagasikara vivipara'' Köhler & Glaubrecht, 2010 – endemic * ''Madagasikara zazavavindrano'' Köhler & Glaubrecht, 2010 – endemic * ''Madagasikara vazimba'' Köhler & Glaubrecht, 2010 – endemic Planorbidae – there are 4 species of '' Bulinus:. * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pachychilidae
Pachychilidae, common name pachychilids, is a taxonomic family of freshwater snails, gastropod molluscs in the clade Sorbeoconcha.Gofas, S. (2014). Pachychilidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=411651 on 2014-11-20 Distribution Pachychilids are freshwater snails with a worldwide distribution in the tropics. Representatives are found in South and Central America, Africa, Madagascar, South and South-east Asia and tropical Australia (Queensland: Torres Strait Islands). Description Pachychilids have an operculum, which is concentric and multispiral. Ecology All species in the family inhabit freshwater except '' Faunus ater'', which is a brackish water snail found in estuaries and other coastal habitats. Pachychilids are either oviparous (lay eggs), ovoviviparous or viviparous (retain developing eggs and youngs in special incubatory structures). Notes on the taxonomy The name is derived from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a Gastropoda, gastropod or snail, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naturalis Biodiversity Center - RMNH
Naturalis Biodiversity Center ( nl, Nederlands Centrum voor Biodiversiteit Naturalis) is a national museum of natural history and a research center on biodiversity in Leiden, Netherlands. It was named the European Museum of the Year 2021. Although its current name and organization are relatively recent, the history of Naturalis can be traced back to the early 1800s. Its collection includes approximately 42 million specimens, making it one of the largest natural history collections in the world. History The beginnings of Naturalis go back to the creation of the Rijksmuseum van Natuurlijke Historie (abbreviated RMNH, National Museum of Natural History) by Dutch King William I on August 9, 1820. In 1878, the geological and mineralogical collections of the museum were split off into a separate museum, remaining distinct until the merger of the Rijksmuseum van Natuurlijke Historie with the Rijksmuseum van Geologie en Mineralogie (abbreviated RGM) in 1984, to form the Nationaal N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagasikara Zazavavindrano
''Madagasikara zazavavindrano'' is a species of gastropods belonging to the family Pachychilidae. The species is found in Madagascar. Per IUCN, the species has the status "critically endangered". References Pachychilidae {{Pachychilidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagasikara Vazimba
Madagasikara may be: *The Malagasy name for Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ... * ''Madagasikara'' (gastropod), an animal genus {{dab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example ''Cytisus aeolicus'' is an endemite of the Italian flora. ''Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Endemism")