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Gusana (genus)
''Gusana'' is a genus of land planarian Geoplanidae is a family of flatworms known commonly as land planarians or land flatworms. These flatworms are mainly predators of other invertebrates, which they hunt, attack and capture using physical force and the adhesive and digestive proper ...s found in Chile. Description ''Gusana'' was defined as land planarians with a broad, leaf-like body that tapers very abruptly anteriorly, giving it a triangular anterior end. The cutaneous musculature, both ventrally and dorsally, is partially sunk into the mesenchyma. The sensory border forms a thick edge around the ventral margin of the anterior end and the sensory pits are internally branched, differently from what occurs in most Neotropical land planarians. The copulatory apparatus has a small intra-antral penis papilla and the female canal enters the genital antrum ventrally. Species The genus ''Gusana'' currently includes seven species: *'' Gusana cruciata'' *'' Gusana hualpensi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ludwig Von Graff
Ludwig Graff de Pancsova (2 January 1851 – 6 February 1924), known as Ludwig von Graff, was an Austrian zoologist born in Pancsova. In 1871, he received his medical degree in Vienna, afterwards studying zoology at the University of Graz. In 1872, he was an assistant at the zoological institute in Strasbourg, where he worked closely with Eduard Oscar Schmidt (1823–1886). In 1873, he relocated to Munich as an assistant to Karl Theodor Ernst von Siebold (1804–1885), gaining his habilitation during the following year. In 1876, he became a professor at the Academy of Forestry in Aschaffenburg, and from 1884 was a professor of zoology at the University of Graz. Here, he expanded the institute of zoology and its library. In 1896-97, he was rector of the university. Graff was a leading expert on Turbellaria (flatworms), especially remembered for research of its morphology and biological systematics. He gathered material for his studies on numerous expeditions, which includ ... [...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] |
Land Planarian
Geoplanidae is a family of flatworms known commonly as land planarians or land flatworms. These flatworms are mainly predators of other invertebrates, which they hunt, attack and capture using physical force and the adhesive and digestive properties of their mucus. They lack water-retaining mechanisms and are therefore very sensitive to humidity variations of their environment. Because of their strict ecological requirements, some species have been proposed as indicators of the conservation state of their habitats. They are generally animals with low vagility (dispersal ability) and with very specific habitat requirements, so they can be also used to accurately determine the distribution of biogeographic realms. Today the fauna of these animals is being studied to select conservation priorities in the Atlantic rainforest in Brazil. At the other extreme, one species in this family, ''Platydemus manokwari'' has become an invasive species in both disturbed and wild habitats in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproductive System Of Planarians
The reproductive system of planarians is broadly similar among different families, although the associated structures can vary in complexity. All planarians are hermaphrodites, so their reproductive system has a male and a female part. Both parts communicate with the surface of the body via a single opening called gonopore, which is located on the ventral side of the posterior half of the body. Male part of the reproductive system The male part of the reproductive system in planarians has a set of several testicles, distributed throughout the body in two or more rows. They are usually concentrated in the anterior two thirds of the body, although they can reach close to the posterior end. The testicles are connected to a pair of sperm ducts which run posteriorly towards the gonopore. In some groups, the sperm ducts met in their distal part, forming the ejaculatory duct, which then opens in a cavity called “male atrium”. In others, like land planarians, both open i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gusana Hualpensis
Gusana is the name of an artificial lake and of the surrounding area, in the territory of Gavoi, Sardinia, Italy. The lake was built in the 1930s to store water for an electricity generator (central of Coghinadordza), and it covered an ancient Roman bridge as well as an ancient archaeological site of the Nuragici people Archaeological evidence of prehistoric human settlement on the island of Sardinia is present in the form of nuraghes and other prehistoric monuments, which dot the land. The recorded history of Sardinia begins with its contacts with the various .... It is now a tourist destination. Lakes of Sardinia {{Sardinia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gusana Lata
''Gusana'' is a genus of land planarians found in Chile. Description ''Gusana'' was defined as land planarians with a broad, leaf-like body that tapers very abruptly anteriorly, giving it a triangular anterior end. The cutaneous musculature, both ventrally and dorsally, is partially sunk into the mesenchyma. The sensory border forms a thick edge around the ventral margin of the anterior end and the sensory pits are internally branched, differently from what occurs in most Neotropical land planarians. The copulatory apparatus has a small intra-antral penis papilla and the female canal enters the genital antrum ventrally. Species The genus ''Gusana'' currently includes seven species: *''Gusana cruciata'' *''Gusana hualpensis Gusana is the name of an artificial lake and of the surrounding area, in the territory of Gavoi, Sardinia, Italy. The lake was built in the 1930s to store water for an electricity generator (central of Coghinadordza), and it covered an ancie ...' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gusana Lujanae
Gusana is the name of an artificial lake and of the surrounding area, in the territory of Gavoi, Sardinia, Italy. The lake was built in the 1930s to store water for an electricity generator (central of Coghinadordza), and it covered an ancient Roman bridge as well as an ancient archaeological site of the Nuragici people Archaeological evidence of prehistoric human settlement on the island of Sardinia is present in the form of nuraghes and other prehistoric monuments, which dot the land. The recorded history of Sardinia begins with its contacts with the various .... It is now a tourist destination. Lakes of Sardinia {{Sardinia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gusana Platei
''Gusana'' is a genus of land planarians found in Chile. Description ''Gusana'' was defined as land planarians with a broad, leaf-like body that tapers very abruptly anteriorly, giving it a triangular anterior end. The cutaneous musculature, both ventrally and dorsally, is partially sunk into the mesenchyma. The sensory border forms a thick edge around the ventral margin of the anterior end and the sensory pits are internally branched, differently from what occurs in most Neotropical land planarians. The copulatory apparatus has a small intra-antral penis papilla and the female canal enters the genital antrum ventrally. Species The genus ''Gusana'' currently includes seven species: *''Gusana cruciata'' *''Gusana hualpensis'' *''Gusana lata'' *''Gusana lujanae'' *''Gusana melipeucensis Gusana is the name of an artificial lake and of the surrounding area, in the territory of Gavoi, Sardinia, Italy. The lake was built in the 1930s to store water for an electricity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gusana Purensis
Gusana is the name of an artificial lake and of the surrounding area, in the territory of Gavoi, Sardinia, Italy. The lake was built in the 1930s to store water for an electricity generator (central of Coghinadordza), and it covered an ancient Roman bridge as well as an ancient archaeological site of the Nuragici people Archaeological evidence of prehistoric human settlement on the island of Sardinia is present in the form of nuraghes and other prehistoric monuments, which dot the land. The recorded history of Sardinia begins with its contacts with the various .... It is now a tourist destination. Lakes of Sardinia {{Sardinia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geoplanidae
Geoplanidae is a family of flatworms known commonly as land planarians or land flatworms. These flatworms are mainly predators of other invertebrates, which they hunt, attack and capture using physical force and the adhesive and digestive properties of their mucus. They lack water-retaining mechanisms and are therefore very sensitive to humidity variations of their environment. Because of their strict ecological requirements, some species have been proposed as indicators of the conservation state of their habitats. They are generally animals with low vagility (dispersal ability) and with very specific habitat requirements, so they can be also used to accurately determine the distribution of biogeographic realms. Today the fauna of these animals is being studied to select conservation priorities in the Atlantic rainforest in Brazil. At the other extreme, one species in this family, ''Platydemus manokwari'' has become an invasive species in both disturbed and wild habitats in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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