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Mecicobothriidae
Dwarf tarantulas, also known as sheet funnel-web spiders are a type of spider from the family Mecicobothriidae. Dwarf tarantulas are one of several families of the suborder Mygalomorphae; this larger group also includes the true tarantulas. Description Dwarf tarantulas, as the name indicates, appear very similar to tarantulas, but are physically much smaller. Many specimens are smaller than 1 cm in length, and the largest in the family are seldom larger than 2 cm. The spiders, like all Mygalomorphae, have downward pointing fangs; dwarf tarantulas also have long spinnerets. Genera There is currently only 1 recognized genus in this family: ''Mecicobothrium'' Holmberg, 1882 * '' Mecicobothrium baccai'' Lucas et al., 2006 — Brazil * ''Mecicobothrium thorelli'' Holmberg, 1882 — Argentina, Uruguay Genera moved to other families include: *''Hexura'' Simon, 1884 → Antrodiaetidae *'' Hexurella'' Gertsch & Platnick, 1979 → Hexurellidae *''Megahexura'' Kaston, 1972 → ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mygalomorphae
The Mygalomorphae, or mygalomorphs, are an infraorder of spiders, and comprise one of three major groups of living spiders with over 3000 species, found on all continents except Antarctica. Many members are known as trapdoor spiders due to them forming trapdoors over their burrows. Other prominent groups include Australian funnel web spiders and tarantulas, with the latter accounting for around one third of all mygalomorphs. Description This group of spiders comprises mostly heavy-bodied, stout-legged spiders including tarantulas, Australian funnel-web spiders, mouse spiders, and various families of spiders commonly called trapdoor spiders. Like the "primitive" suborder of spiders Mesothelae, they have two pairs of book lungs, and downward-pointing chelicerae. Because of this, the two groups were once believed to be closely related. Later it was realized that the common ancestors of all spiders had these features (a state known as symplesiomorphy). Following the br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mecicobothrium Thorelli
''Mecicobothrium thorelli'' is a spider in the family Mecicobothriidae, native to Argentina and Uruguay. It was first described in 1882 by Holmberg. The specific name ''thorelli'' honours Tamerlan Thorell Tord Tamerlan Teodor Thorell (3 May 1830 – 22 December 1901) was a Swedish arachnologist. Thorell studied spiders with Giacomo Doria at the Museo Civico di Storia Naturale de Genoa. He corresponded with other arachnologists, such as Octavius P .... The species is most abundant in autumn and winter. References Mygalomorphae Spiders of South America Spiders described in 1882 {{Mygalomorphae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mecicobothrium
''Mecicobothrium'' is a genus of dwarf tarantulas first described by Eduardo Ladislao Holmberg in 1882. These spiders have three tarsal claws. The cephalic groove (fovea) is longitudinal. The abdomen has plates. The male palpal bulb lies in a long modified final joint. The posterior lateral spinnerets are very long, with the last joint whiplike. Species , the genus contained only two species: * ''Mecicobothrium baccai'' Lucas et al., 2006 — Brazil * ''Mecicobothrium thorelli ''Mecicobothrium thorelli'' is a spider in the family Mecicobothriidae, native to Argentina and Uruguay. It was first described in 1882 by Holmberg. The specific name ''thorelli'' honours Tamerlan Thorell Tord Tamerlan Teodor Thorell (3 May 1 ...'' Holmberg, 1882 — Argentina, Uruguay References Mygalomorphae Mygalomorphae genera Taxa named by Eduardo Ladislao Holmberg {{Mygalomorphae-stub ... [...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 Swedi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexura
''Hexura'' is a genus of American folding trapdoor spiders that was first described by Eugène Louis Simon in 1884. it contains two species, found in the United States: '' H. picea'' and '' H. rothi''. Originally placed with Mecicobothriidae Dwarf tarantulas, also known as sheet funnel-web spiders are a type of spider from the family Mecicobothriidae. Dwarf tarantulas are one of several families of the suborder Mygalomorphae; this larger group also includes the true tarantulas. Desc ..., it was moved to Antrodiaetidae in 2019. See also * List of Antrodiaetidae species References Antrodiaetidae Mygalomorphae genera Spiders of the United States Spiders of Canada {{Mygalomorphae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinneret (spider)
A spinneret is a silk-spinning organ of a spider or the larva of an insect. Some adult insects also have spinnerets, such as those borne on the forelegs of Embioptera. Spinnerets are usually on the underside of a spider's opisthosoma, and are typically segmented. While most spiders have six spinnerets, some have two, four, or eight. They can move both independently and in concert. Most spinnerets are not simple structures with a single orifice producing a single thread, but complex structures of many microscopic spigots, each producing one filament. This produces the necessary orientation of the protein molecules, without which the silk would be weak and useless. Spigots can be singular or found in groups, which also permits spiders to combine multiple filaments in different ways to produce many kinds of silk for various purposes. Spinneret morphology can help arachnologists identify the taxon of a specimen and the specific morphology of a spigot can determine its use as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tarantula
Tarantulas comprise a group of large and often hairy spiders of the family Theraphosidae. , 1,040 species have been identified, with 156 genera. The term "tarantula" is usually used to describe members of the family Theraphosidae, although many other members of the same infraorder ( Mygalomorphae) are commonly referred to as "tarantulas" or "false tarantulas". Some of the more common species have become popular in the exotic pet trade. Many New World species kept as pets have setae known as urticating hairs that can cause irritation to the skin, and in extreme cases, cause damage to the eyes. Overview Like all arthropods, the tarantula is an invertebrate that relies on an exoskeleton for muscular support.Pomeroy, R. (2014, February 4). Pub. Real Clear Science, "Spiders, and Their Amazing Hydraulic Legs and Genitalia". Retrieved October 13, 2019, from https://www.realclearscience.com/blog/2013/02/spiders-their-amazing-hydraulic-legs-and-genitals.html. Like other Arachn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eduardo Ladislao Holmberg
Eduardo Ladislao Holmberg (27 July 1852, in Buenos Aires – 4 November 1937) was an Argentine natural historian and novelist, one of the leading figures in Argentine biology. Together with Florentino Ameghino he undertook the inventory of Argentine flora and fauna, and explored all the ecoregions in the country, summarizing for the first time the biodiversity of its territory. The son of botanical aficionado and grandson of the Baron Holmberg, Holmburg accompanied Argentine '' Libertador'' Manuel Belgrano on his campaigns and introduced the cultivation of the ''camellia'' to Argentina. As director of the Buenos Aires Zoological Garden he greatly developed its scientific aspect, publishing booklets and providing printed media for a learned appreciation of its contents. He also directed the Natural History Cabinet of the University of Buenos Aires and published the standard reference works on botany and zoology used in his country for most of the 20th century. While less di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antrodiaetidae
Antrodiaetidae, also known as folding trapdoor spiders or folding-door spiders, is a small spider family related to atypical tarantulas. They are found almost exclusively in the western and midwestern United States, from California to Washington and east to the Appalachian mountains. Exceptions include ''Antrodiaetus roretzi'' and ''Antrodiaetus yesoensis'', which are endemic to Japan and are considered relict species. It is likely that two separate vicariance events led to the evolution of these two species. Genera , the World Spider Catalog accepted the following genera: *''Aliatypus'' Smith, 1908 — United States *''Antrodiaetus'' Ausserer, 1871 — United States, Japan *''Atypoides'' O. Pickard-Cambridge, 1883 — United States *''Hexura'' Simon, 1884 — United States Name The name “folding-door” describes how they open or close the entrance to their burrow; they unfold or fold the door. See also * List of Antrodiaetidae species This page lists all described gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexurella
''Hexurella'' is a genus of spiders, found in the United States and Mexico. It is the only genus in the family Hexurellidae. Species , the World Spider Catalog accepted the following species: *'' Hexurella apachea'' Gertsch & Platnick, 1979 – US *'' Hexurella encina'' Gertsch & Platnick, 1979 – Mexico *'' Hexurella pinea'' Gertsch & Platnick, 1979 (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 ...) – US *'' Hexurella rupicola'' Gertsch & Platnick, 1979 – US References Mygalomorphae genera Mygalomorphae {{Mygalomorphae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
