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Trechona
''Trechona'' is a genus of South American curtain web spiders that was first described by C. L. Koch in 1850. The venom of at least one species is considered potentially dangerous to humans. Characteristics Spiders of this genus grow up to 5 cm in length, are brownish to blackened, with a '' zebra '' coloring on the abdomen, with clear transverse bands, the lyre is composed of rigid bristles of different sizes. They are spiders of fossorial and nocturnal habits, found in tunnels dug in ravines, also on top of logs or rocks in the forest, this species is very common in the Atlantic forest. Studies show that the venom of T. venosa is more potent than that of the Brazilian yellow scorpion ( Tityus serrulatus). Few recorded accidents, possibly caused by T. rufa. The venom of T. venosa has a lethal dose of 0.070 mg for 20 grams rat by subcutaneous injection, and 0.030 mg by intravenous injection, 2 mg by intramuscular injection results in muscle contractions, p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trechona Adspersa
''Trechona'' is a genus of South American curtain web spiders that was first described by C. L. Koch in 1850. The venom of at least one species is considered potentially dangerous to humans. Characteristics Spiders of this genus grow up to 5 cm in length, are brownish to blackened, with a '' zebra '' coloring on the abdomen, with clear transverse bands, the lyre is composed of rigid bristles of different sizes. They are spiders of fossorial and nocturnal habits, found in tunnels dug in ravines, also on top of logs or rocks in the forest, this species is very common in the Atlantic forest. Studies show that the venom of T. venosa is more potent than that of the Brazilian yellow scorpion ( Tityus serrulatus). Few recorded accidents, possibly caused by T. rufa. The venom of T. venosa has a lethal dose of 0.070 mg for 20 grams rat by subcutaneous injection, and 0.030 mg by intravenous injection, 2 mg by intramuscular injection results in muscle contractions, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trechona Uniformis
''Trechona'' is a genus of South American curtain web spiders that was first described by C. L. Koch in 1850. The venom of at least one species is considered potentially dangerous to humans. Characteristics Spiders of this genus grow up to 5 cm in length, are brownish to blackened, with a '' zebra '' coloring on the abdomen, with clear transverse bands, the lyre is composed of rigid bristles of different sizes. They are spiders of fossorial and nocturnal habits, found in tunnels dug in ravines, also on top of logs or rocks in the forest, this species is very common in the Atlantic forest. Studies show that the venom of T. venosa is more potent than that of the Brazilian yellow scorpion ( Tityus serrulatus). Few recorded accidents, possibly caused by T. rufa. The venom of T. venosa has a lethal dose of 0.070 mg for 20 grams rat by subcutaneous injection, and 0.030 mg by intravenous injection, 2 mg by intramuscular injection results in muscle contractions, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trechona Rufa
''Trechona'' is a genus of South American curtain web spiders that was first described by C. L. Koch in 1850. The venom of at least one species is considered potentially dangerous to humans. Characteristics Spiders of this genus grow up to 5 cm in length, are brownish to blackened, with a '' zebra '' coloring on the abdomen, with clear transverse bands, the lyre is composed of rigid bristles of different sizes. They are spiders of fossorial and nocturnal habits, found in tunnels dug in ravines, also on top of logs or rocks in the forest, this species is very common in the Atlantic forest. Studies show that the venom of T. venosa is more potent than that of the Brazilian yellow scorpion ( Tityus serrulatus). Few recorded accidents, possibly caused by T. rufa. The venom of T. venosa has a lethal dose of 0.070 mg for 20 grams rat by subcutaneous injection, and 0.030 mg by intravenous injection, 2 mg by intramuscular injection results in muscle contractions, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trechona Excursora
''Trechona'' is a genus of South American curtain web spiders that was first described by C. L. Koch in 1850. The venom of at least one species is considered potentially dangerous to humans. Characteristics Spiders of this genus grow up to 5 cm in length, are brownish to blackened, with a '' zebra '' coloring on the abdomen, with clear transverse bands, the lyre is composed of rigid bristles of different sizes. They are spiders of fossorial and nocturnal habits, found in tunnels dug in ravines, also on top of logs or rocks in the forest, this species is very common in the Atlantic forest. Studies show that the venom of T. venosa is more potent than that of the Brazilian yellow scorpion ( Tityus serrulatus). Few recorded accidents, possibly caused by T. rufa. The venom of T. venosa has a lethal dose of 0.070 mg for 20 grams rat by subcutaneous injection, and 0.030 mg by intravenous injection, 2 mg by intramuscular injection results in muscle contractions, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trechona Diamantina
''Trechona'' is a genus of South American curtain web spiders that was first described by C. L. Koch in 1850. The venom of at least one species is considered potentially dangerous to humans. Characteristics Spiders of this genus grow up to 5 cm in length, are brownish to blackened, with a '' zebra '' coloring on the abdomen, with clear transverse bands, the lyre is composed of rigid bristles of different sizes. They are spiders of fossorial and nocturnal habits, found in tunnels dug in ravines, also on top of logs or rocks in the forest, this species is very common in the Atlantic forest. Studies show that the venom of T. venosa is more potent than that of the Brazilian yellow scorpion ( Tityus serrulatus). Few recorded accidents, possibly caused by T. rufa. The venom of T. venosa has a lethal dose of 0.070 mg for 20 grams rat by subcutaneous injection, and 0.030 mg by intravenous injection, 2 mg by intramuscular injection results in muscle contractions, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trechona Cotia
''Trechona'' is a genus of South American curtain web spiders that was first described by C. L. Koch in 1850. The venom of at least one species is considered potentially dangerous to humans. Characteristics Spiders of this genus grow up to 5 cm in length, are brownish to blackened, with a '' zebra '' coloring on the abdomen, with clear transverse bands, the lyre is composed of rigid bristles of different sizes. They are spiders of fossorial and nocturnal habits, found in tunnels dug in ravines, also on top of logs or rocks in the forest, this species is very common in the Atlantic forest. Studies show that the venom of T. venosa is more potent than that of the Brazilian yellow scorpion ( Tityus serrulatus). Few recorded accidents, possibly caused by T. rufa. The venom of T. venosa has a lethal dose of 0.070 mg for 20 grams rat by subcutaneous injection, and 0.030 mg by intravenous injection, 2 mg by intramuscular injection results in muscle contractions, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trechona Venosa
''Trechona venosa'' is a species of a venomous spider edemic to South America. Description and behavior ''Trechona venosa'' is a large South American mygalomorphae, they grow from 3 to 4.5 in length (1.2–1.8 inches). In wingspan, they can grow from 6 to 7 cm, equivalent to 2.4–2.8 inches respectively, while the fangs measure 3–4 mm in length. Its color is black or brownish-gray, with yellow stripes on the abdomen. ''Trechona venosa'' is not an aggressive spider, inhabiting plants in the tropical forests of the Atlantic Forest. They live on the edges of forests in places far from housing and human activity. They have nocturnal /twilight habits, they are solitary animals, meeting members of their species only during the mating season. They weave funnel-shaped webs.http://repositorio.unicamp.br/jspui/bitstream/REPOSIP/314604/1/Fontana_MarcosDias_D.pdf Distribution These spiders are restricted to the Atlantic Forest of Brazil Brazil ( pt, Brasil; ), offic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dipluridae
The family Dipluridae, known as curtain-web spiders (or confusingly with other distantly related ones as funnel-web tarantulas) are a group of spiders in the infraorder Mygalomorphae, that have two pairs of booklungs, and chelicerae (fangs) that move up and down in a stabbing motion. A number of genera, including that of the Sydney funnel-web spider (''Atrax''), used to be classified in this family but have now been moved to Hexathelidae. Description Dipluridae lack a rastellum (stout conical spines) on their chelicerae. Their carapace is characterized by the head region not being higher than the thoracic region. Their posterior median spinnerets (silk-extruding organs) are much shorter than their posterior lateral spinnerets, which have three segments, and are elongated (almost as long as their opisthosoma). Most of the species are medium to small-sized spiders; some may measure about 15 mm.Murphy & Murphy 2000 The cave species ''Masteria caeca'' is eyeless. Biology Mem ... [...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] |
Cândido Firmino De Mello-Leitão
Cândido Firmino de Mello-Leitão (July 17, 1886 – December 14, 1948) was a Brazilian zoologist who is considered the founder of Arachnology in South America, publishing 198 papers on the taxonomy of Arachnida. He was also involved with education, writing high-school textbooks, and contributed to biogeography, with essays on the distribution of Arachnida in the South American continent. Biography Cândido Firmino de Mello-Leitão was born on the Cajazeiras Farm, Campina Grande, Paraíba state, Brazil, to Colonel Cândido Firmino and Jacunda de Mello-Leitão. He died in Rio de Janeiro, Brazil. His parents were subsistence farmers, and he had 15 brothers and sisters. He lived most of his childhood at the state of Pernambuco. His first job as a zoologist (1913) was at the Escola Superior de Agricultura e Medicina Veterinária in Piraí, RJ, as a teacher of general Zoology and Systematics. In 1915, he published his first taxonomical paper, with descriptions of some genera and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Ludwig Koch
Carl Ludwig Koch (21 September 1778 – 23 August 1857) was a German entomologist and arachnologist. He was responsible for classifying a great number of spiders, including the Brazilian whiteknee tarantula and common house spider. He was born in Kusel, Germany, and died in Nuremberg, Germany. Carl Ludwig Koch was an inspector of water and forests. His principal work ''Die Arachniden'' (1831–1848) (16 volumes) was commenced by Carl Wilhelm Hahn (1786–1836). Koch was responsible for the last 12 volumes. He also finished the chapter on spiders in ''Faunae insectorum germanicae initia oder Deutschlands Insecten'' lements of the insect fauna of Germanya work by Georg Wolfgang Franz Panzer (1755–1829). He also co-authored, with Georg Karl Berendt, an important monograph ''Die im Bernstein befindlichen Myriapoden, Arachniden und Apteren der Vorwelt'' (1854) on arachnids, myriapods, and wingless insects in amber based on material in Berendt's collection, now held in the Muse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philipp Bertkau
Philipp Bertkau (11 January 1849 – 22 October 1894) was a German zoologist born in Cologne. He studied natural sciences at the University of Bonn, where in 1872 he earned his doctorate. In 1873 he became an assistant at the botanical institute in Munich, and during the following spring was an assistant at the zoological institute at Bonn. In 1882 he was appointed professor at the Agricultural Academy of Poppelsdorf, and in 1890 became curator at the Institute of Zoology and Comparative Anatomy. Bertkau is remembered for his work involving the anatomy and physiology of spiders, research on sense of smell in butterflies, and anatomical studies of hermaphroditic arthropods. At Bonn he was secretary of ''Bonner Gesellschaft für Naturgeschichte'' (Bonn Society of Natural History). He is the taxonomic authority of the families Anyphaenidae, Hahniidae, Sparassidae and Zoropsidae, and of the genera ''Ancylometes'', ''Chalcoscirtus'', ''Comaroma'' and ''Diplocephalus''. Selected wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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