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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] |
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] |
Mecicobothrium Baccai
''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 (zoology), specific name ''thorelli'' honours Tamerlan Thorell. The species is ...'' Holmberg, 1882 — Argentina, Uruguay References Mygalomorphae Mygalomorphae genera Taxa named by Eduardo Ladislao Holmberg {{Mygalomorphae-stub ... [...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] |
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] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...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] |
Palpal Bulb
The two palpal bulbs – also known as palpal organs and genital bulbs – are the copulatory organs of a male spider. They are borne on the last segment of the pedipalps (the front "limbs" of a spider), giving the spider an appearance often described as like wearing boxing gloves. The palpal bulb does not actually produce sperm, being used only to transfer it to the female. Palpal bulbs are only fully developed in adult male spiders and are not completely visible until after the final moult. In the majority of species of spider, the bulbs have complex shapes and are important in identification. Structure The palpal bulb of a mature male spider is borne on the last segment of the pedipalp. This segment usually has touch-sensitive hairs (setae) with nerves leading to them. The bulb itself is entirely without nerves, and hence without sensory organs and muscles, since these depend on nerves for their functioning, although some spiders have one or two muscles external to the bulb a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
