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Obama Anthropophila
''Obama anthropophila'' is a species of Brazilian land planarian in the subfamily Geoplaninae. It is a very common land planarian in human-disturbed environments in southern and southeastern Brazil. Description ''Obama anthropophila'' is a medium-sized land planarian with a lanceolate body. The largest specimens have a length of about or more. The dorsum varies from dark to light brown, becoming lighter towards the body margins. The ventral side is pale grey or brown and has a darker margin that is a continuation of the color of the dorsum. It is very similar in appearance to the closely related '' Obama decidualis'' and '' Obama ladislavii'', the main difference with the latter being the color. The numerous of eyes of ''O. anthropophila'' are distributed marginally on the first millimeters of the body and posteriorly become dorsal, occupying almost the entire body width at the median third. Posteriorly they become less numerous. The dorsal eyes are surrounded by a region wit ... [...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] |
Laboratory
A laboratory (; ; colloquially lab) is a facility that provides controlled conditions in which scientific or technological research, experiments, and measurement may be performed. Laboratory services are provided in a variety of settings: physicians' offices, clinics, hospitals, and regional and national referral centers. Overview The organisation and contents of laboratories are determined by the differing requirements of the specialists working within. A physics laboratory might contain a particle accelerator or vacuum chamber, while a metallurgy laboratory could have apparatus for casting or refining metals or for testing their strength. A chemist or biologist might use a wet laboratory, while a psychologist's laboratory might be a room with one-way mirrors and hidden cameras in which to observe behavior. In some laboratories, such as those commonly used by computer scientists, computers (sometimes supercomputers) are used for either simulations or the analysis of data ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolichoplana Carvalhoi
''Dolichoplana'' is a genus of land planarians in the tribe Rhynchodemini. Description Species of the genus ''Dolichoplana'' are characterized by a very elongate and flattened body with creeping sole of moderate width. The anterior end is rounded and slightly concave, bordered by glandular and sensory tracts, and has two large eyes. The parenchymal longitudinal musculature is restricted to the ventral region. The copulatory apparatus has a long and folded chamber in the male atrium, without a penis papilla. A prominent diverticulum opens into the common atrium from its posterior wall. Species The genus ''Dolichoplana'' currently contains three species: * '' Dolichoplana carvalhoi'' Corrêa, 1947 * ''Dolichoplana striata'' Moseley, 1877 * ''Dolichoplana vircata ''Dolichoplana'' is a genus of land planarians in the tribe Rhynchodemini. Description Species of the genus ''Dolichoplana'' are characterized by a very elongate and flattened body with creeping sole of moderat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luteostriata Abundans
''Luteostriata abundans'' is a species of Brazilian land planarian in the subfamily Geoplaninae. It is a common species in human-disturbed areas in Brazil's southernmost state, Rio Grande do Sul. Description ''Luteostriata abundans'' is a small to medium-sized land planarian with an elongate body and parallel margins. The largest specimens have a length of about 60 millimeters or more. The dorsum has a yellow tinge, varying from cream to dark yellow or light brown and is marked by seven longitudinal dark brown to black stripes. The ventral side is cream. The numerous eyes are very small and hardly visible to the naked eye. They are distributed marginally on the first millimeters of the body and posteriorly become dorsal, covering the two most external stripes on each side. The eyes that cover the stripes are surrounded by halos, zones without pigmentation, which may be perceived as small clear dots. Distribution ''Luteostriata abundans'' is found in human-disturbed area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deroceras Laeve
''Deroceras laeve'', the marsh slug, is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Agriolimacidae. Distribution The distribution of ''Deroceras laeve'' was originally Palearctic, from the subpolar zones to the southern margins. Today this slug species has been introduced worldwide except Antarctica, also on tropical islands such as New Guinea and on Pacific islands. Europe: * British Isles: Great Britain and Ireland. The species has shown little evidence for significant decline in Britain. * Czech Republic Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. nnotated list of mollusc species recorded outdoors in the Czech and Slovak Republics. ''Malacologica Bohemoslovaca'', Suppl. 1: 1-37PDF - least concern (LC) * Netherlands * Poland * Slovakia * Ukraine * Sweden * Switzerland - lower concern in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornu Aspersum
''Cornu aspersum'' (syn. ''Cryptomphalus aspersus''), known by the common name garden snail, is a species of land snail in the family Helicidae, which includes some of the most familiar land snails. Of all terrestrial molluscs, this species may well be the most widely known. It was classified under the name ''Helix aspersa'' for over two centuries, but the prevailing classification now places it in the genus ''Cornu''. The snail is relished as a food item in some areas, but it is also widely regarded as a pest in gardens and in agriculture, especially in regions where it has been introduced accidentally, and where snails are not usually considered to be a menu item. Description The adult bears a hard, thin calcareous shell in diameter and high, with four or five whorls. The shell is variable in coloring and shade of color, but generally it has a reticulated pattern of dark brown, brownish-golden, or chestnut with yellow stripes, flecks, or streaks (characteristically inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bradybaena Similaris
''Bradybaena similaris'', the Asian trampsnail, is a species of small, invasive land snail. It is a pulmonate gastropod terrestrial mollusc in the family Bradybaenidae. It earned the common name based on its origins, and its habit of roosting on freight containers . This habit means that this may be one of the most broadly-distributed species of terrestrial snail in the world. ''Bradybaena similaris'' is the type species of the genus ''Bradybaena''. Distribution This species is native to Southeast Asia, but it has been accidentally introduced to many areas around the world. The distribution includes: * Pratas Island, TaiwanWu S.-P., Hwang C.-C., Huang H.-M., Chang H.-W., Lin Y.-S. & Lee P.-F. (2007). "Land Molluscan Fauna of the Dongsha Island with Twenty New Recorded Species". ''Taiwania'' 52(2): 145-151PDF The introduced distribution includes states on the Gulf of Mexico, and it is widespread in Florida, USA. It has become widespread in Eastern Australia, usually living in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Grande Do Sul
Rio Grande do Sul (, , ; "Great River of the South") is a state in the southern region of Brazil. It is the fifth-most-populous state and the ninth largest by area. Located in the southernmost part of the country, Rio Grande do Sul is bordered clockwise by Santa Catarina to the north and northeast, the Atlantic Ocean to the east, the Uruguayan departments of Rocha, Treinta y Tres, Cerro Largo, Rivera and Artigas to the south and southwest, and the Argentine provinces of Corrientes and Misiones to the west and northwest. The capital and largest city is Porto Alegre. The state has the highest life expectancy in Brazil, and the crime rate is relatively low compared to the Brazilian national average. Despite the high standard of living, unemployment is still high in the state, as of 2017. The state has 5.4% of the Brazilian population and it is responsible for 6.6% of the Brazilian GDP. The state shares a gaucho culture with its neighbors Argentina and Uruguay. Befo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazil
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area and the seventh most populous. Its capital is Brasília, and its most populous city is São Paulo. The federation is composed of the union of the 26 states and the Federal District. It is the largest country to have Portuguese as an official language and the only one in the Americas; one of the most multicultural and ethnically diverse nations, due to over a century of mass immigration from around the world; and the most populous Roman Catholic-majority country. Bounded by the Atlantic Ocean on the east, Brazil has a coastline of . It borders all other countries and territories in South America except Ecuador and Chile and covers roughly half of the continent's land area. Its Amazon basin includes a vast tropical forest, ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
São Paulo (state)
São Paulo () is one of the Federative units of Brazil, 26 states of the Brazil, Federative Republic of Brazil and is named after Paul of Tarsus, Saint Paul of Tarsus. A major industrial complex, the state has 21.9% of the Brazilian population and is responsible for 33.9% of Brazil's GDP. São Paulo also has the List of Brazilian federative units by Human Development Index, second-highest Human Development Index (HDI) and GDP per capita, the List of Brazilian states by infant mortality, fourth-lowest infant mortality rate, the List of Brazilian states by life expectancy, third-highest life expectancy, and the List of Brazilian states by literacy rate, third-lowest rate of illiteracy among the federative units of Brazil. São Paulo alone is wealthier than Argentina, Uruguay, Paraguay, and Bolivia combined. São Paulo is also the world's twenty-eighth-most populous Administrative division, sub-national entity and the most populous sub-national entity in the Americas. With more than 4 ... [...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] |
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