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Hexophthalma Dolichocephala
''Hexophthalma'' is a genus of spiders in the family Sicariidae. Although the genus was originally erected in 1878 (then with the name ''Hexomma''), it was merged into the genus '' Sicarius'' in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in ''Sicarius'' were distinct. The English name six-eyed sand spiders is used for members of the genus, particularly ''Hexophthalma hahni''. Species in the genus have necrotic (dermonecrotic) venom, and can potentially cause serious or even life-threatening wounds. Taxonomy The genus was first created in 1878 by Friedrich Karsch as ''Hexomma'', with the sole species '' Hexomma hahni''. By 1879, though, Karsch had realized that this name had already been used in 1877 for a species of harvestman, so he published the replacement name ''Hexophthalma''. In 1893, Eugène Simon transferred ''Hexophthalma hahni'' to the genus '' Sicarius'', and ''Hexophthalma'' fell out of use, until ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Namibia
Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa. Its western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and east. Although Kazungula, it does not border Zimbabwe, less than 200 metres (660 feet) of the Botswanan right bank of the Zambezi, Zambezi River separates the two countries. Namibia gained independence from South Africa on 21 March 1990, following the Namibian War of Independence. Its capital and largest city is Windhoek. Namibia is a member state of the United Nations (UN), the Southern African Development Community (SADC), the African Union (AU) and the Commonwealth of Nations. The driest country in sub-Saharan Africa, Namibia has been inhabited since pre-historic times by the San people, San, Damara people, Damara and Nama people. Around the 14th century, immigration, immigrating Bantu peoples arrived as part of the Bantu expansion. Since ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monophyly
In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic groups are typically characterised by shared derived characteristics ( synapomorphies), which distinguish organisms in the clade from other organisms. An equivalent term is holophyly. The word "mono-phyly" means "one-tribe" in Greek. Monophyly is contrasted with paraphyly and polyphyly as shown in the second diagram. A ''paraphyletic group'' consists of all of the descendants of a common ancestor minus one or more monophyletic groups. A '' polyphyletic group'' is characterized by convergent features or habits of scientific interest (for example, night-active primates, fruit trees, aquatic insects). The features by which a polyphyletic group is differentiated from others are not inherited from a common ancestor. These definitions have taken ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Necrosis
Necrosis () is a form of cell injury which results in the premature death of cells in living tissue by autolysis. Necrosis is caused by factors external to the cell or tissue, such as infection, or trauma which result in the unregulated digestion of cell components. In contrast, apoptosis is a naturally occurring programmed and targeted cause of cellular death. While apoptosis often provides beneficial effects to the organism, necrosis is almost always detrimental and can be fatal. Cellular death due to necrosis does not follow the apoptotic signal transduction pathway, but rather various receptors are activated and result in the loss of cell membrane integrity and an uncontrolled release of products of cell death into the extracellular space. This initiates in the surrounding tissue an inflammatory response, which attracts leukocytes and nearby phagocytes which eliminate the dead cells by phagocytosis. However, microbial damaging substances released by leukocytes would crea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexophthalma Spatulata
''Hexophthalma'' is a genus of spiders in the family Sicariidae. Although the genus was originally erected in 1878 (then with the name ''Hexomma''), it was merged into the genus ''Sicarius (spider), Sicarius'' in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in ''Sicarius'' were distinct. The English name six-eyed sand spiders is used for members of the genus, particularly ''Hexophthalma hahni''. Species in the genus have necrotic (dermonecrotic) venom, and can potentially cause serious or even life-threatening wounds. Taxonomy The genus was first created in 1878 by Friedrich Karsch as ''Hexomma'', with the sole species ''Hexophthalma hahni, Hexomma hahni''. By 1879, though, Karsch had realized that this name had already been used in 1877 for a species of Opiliones, harvestman, so he published the replacement name ''Hexophthalma''. In 1893, Eugène Simon transferred ''Hexophthalma hahni'' to the genus ''Sicarius ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexophthalma Leroyi
''Hexophthalma'' is a genus of spiders in the family Sicariidae. Although the genus was originally erected in 1878 (then with the name ''Hexomma''), it was merged into the genus '' Sicarius'' in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in ''Sicarius'' were distinct. The English name six-eyed sand spiders is used for members of the genus, particularly ''Hexophthalma hahni''. Species in the genus have necrotic (dermonecrotic) venom, and can potentially cause serious or even life-threatening wounds. Taxonomy The genus was first created in 1878 by Friedrich Karsch as ''Hexomma'', with the sole species '' Hexomma hahni''. By 1879, though, Karsch had realized that this name had already been used in 1877 for a species of harvestman, so he published the replacement name ''Hexophthalma''. In 1893, Eugène Simon transferred ''Hexophthalma hahni'' to the genus '' Sicarius'', and ''Hexophthalma'' fell out of use, until ... [...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] |
Hexophthalma Goanikontesensis
''Hexophthalma'' is a genus of spiders in the family Sicariidae. Although the genus was originally erected in 1878 (then with the name ''Hexomma''), it was merged into the genus '' Sicarius'' in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in ''Sicarius'' were distinct. The English name six-eyed sand spiders is used for members of the genus, particularly ''Hexophthalma hahni''. Species in the genus have necrotic (dermonecrotic) venom, and can potentially cause serious or even life-threatening wounds. Taxonomy The genus was first created in 1878 by Friedrich Karsch as ''Hexomma'', with the sole species '' Hexomma hahni''. By 1879, though, Karsch had realized that this name had already been used in 1877 for a species of harvestman, so he published the replacement name ''Hexophthalma''. In 1893, Eugène Simon transferred ''Hexophthalma hahni'' to the genus '' Sicarius'', and ''Hexophthalma'' fell out of use, until ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexophthalma Dolichocephala
''Hexophthalma'' is a genus of spiders in the family Sicariidae. Although the genus was originally erected in 1878 (then with the name ''Hexomma''), it was merged into the genus '' Sicarius'' in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in ''Sicarius'' were distinct. The English name six-eyed sand spiders is used for members of the genus, particularly ''Hexophthalma hahni''. Species in the genus have necrotic (dermonecrotic) venom, and can potentially cause serious or even life-threatening wounds. Taxonomy The genus was first created in 1878 by Friedrich Karsch as ''Hexomma'', with the sole species '' Hexomma hahni''. By 1879, though, Karsch had realized that this name had already been used in 1877 for a species of harvestman, so he published the replacement name ''Hexophthalma''. In 1893, Eugène Simon transferred ''Hexophthalma hahni'' to the genus '' Sicarius'', and ''Hexophthalma'' fell out of use, until ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexophthalma Damarensis
''Hexophthalma'' is a genus of spiders in the family Sicariidae. Although the genus was originally erected in 1878 (then with the name ''Hexomma''), it was merged into the genus '' Sicarius'' in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in ''Sicarius'' were distinct. The English name six-eyed sand spiders is used for members of the genus, particularly ''Hexophthalma hahni''. Species in the genus have necrotic (dermonecrotic) venom, and can potentially cause serious or even life-threatening wounds. Taxonomy The genus was first created in 1878 by Friedrich Karsch as ''Hexomma'', with the sole species '' Hexomma hahni''. By 1879, though, Karsch had realized that this name had already been used in 1877 for a species of harvestman, so he published the replacement name ''Hexophthalma''. In 1893, Eugène Simon transferred ''Hexophthalma hahni'' to the genus '' Sicarius'', and ''Hexophthalma'' fell out of use, until ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexophthalma Binfordae
''Hexophthalma'' is a genus of spiders in the family Sicariidae. Although the genus was originally erected in 1878 (then with the name ''Hexomma''), it was merged into the genus '' Sicarius'' in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in ''Sicarius'' were distinct. The English name six-eyed sand spiders is used for members of the genus, particularly ''Hexophthalma hahni''. Species in the genus have necrotic (dermonecrotic) venom, and can potentially cause serious or even life-threatening wounds. Taxonomy The genus was first created in 1878 by Friedrich Karsch as ''Hexomma'', with the sole species '' Hexomma hahni''. By 1879, though, Karsch had realized that this name had already been used in 1877 for a species of harvestman, so he published the replacement name ''Hexophthalma''. In 1893, Eugène Simon transferred ''Hexophthalma hahni'' to the genus '' Sicarius'', and ''Hexophthalma'' fell out of use, until ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexophthalma Albospinosa
''Hexophthalma'' is a genus of spiders in the family Sicariidae. Although the genus was originally erected in 1878 (then with the name ''Hexomma''), it was merged into the genus '' Sicarius'' in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in ''Sicarius'' were distinct. The English name six-eyed sand spiders is used for members of the genus, particularly ''Hexophthalma hahni''. Species in the genus have necrotic (dermonecrotic) venom, and can potentially cause serious or even life-threatening wounds. Taxonomy The genus was first created in 1878 by Friedrich Karsch as ''Hexomma'', with the sole species '' Hexomma hahni''. By 1879, though, Karsch had realized that this name had already been used in 1877 for a species of harvestman, so he published the replacement name ''Hexophthalma''. In 1893, Eugène Simon transferred ''Hexophthalma hahni'' to the genus '' Sicarius'', and ''Hexophthalma'' fell out of use, until ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Spider Catalog
The World Spider Catalog (WSC) is an online searchable database concerned with spider taxonomy. It aims to list all accepted families, genera and species, as well as provide access to the related taxonomic literature. The WSC began as a series of individual web pages in 2000, created by Norman I. Platnick of the American Museum of Natural History. After Platnick's retirement in 2014, the Natural History Museum of Bern (Switzerland) took over the catalog, converting it to a relational database. , 50,151 accepted species were listed. The order Araneae 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 dive ... (spiders) has the seventh-most species of all orders. The existence of the World Spider Catalog makes spiders the largest taxon with an online listing that is updated regularly. It ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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