|
Deroceras Juranum
''Deroceras juranum'' is a species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Agriolimacidae. Taxonomy Wüthrich (1993) described ''Deroceras juranum'' from the Jura Mountains in Switzerland, distinguishing it from the co-occurring ''Deroceras rodnae'' on the basis of ''Deroceras juranums distinct violet coloration. Later the same coloration was found in Austrian populations by Jordaens et al. (1998) and in other species of ''Deroceras'' by Reise & Hutchinson (2001). Reise (1997) demonstrated that the violet coloration was controlled by a single Mendelian-inherited gene and thus considered ''Deroceras juranum'' to be a variety of ''Deroceras rodnae''. It is treated thus in Wiktor’s (2000) monograph of the Agriolimacidae. Hutchinson & Reise (2009) later realised that what had been considered ''Deroceras rodnae'' was actually two species with radically different mating behaviours and consistent, although subtle, differences in morphol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of 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 produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, 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 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 specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deroceras
''Deroceras'' is a Taxonomy (biology), taxonomic genus of small to medium sized air-breathing land slugs in the family Agriolimacidae. Description Most species reach only 30–35 mm in length (max 45 mm). Coloration varies considerably within and between species but common patterns are pale cream, with or without darker flecks (never stripes), and a more uniform light gray or brown to black-brown. Mucus is usually colourless but in some species includes a white deposit when the slug has been disturbed. No keel (slug), keel continues from the tail along the back. The Mantle (mollusc), mantle is large (up to half the body length), containing a shell plate internally. The pneumostome lies in the posterior half of the mantle. Generally external appearance does not reliably distinguish one species from certain others, so species identification requires dissection to reveal the genitalia, unless the local species diversity is known to be low. The taxonomy, anatomy and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of The Czech Republic
This is a list of the non-marine molluscs of the Czech Republic. That country is land-locked and therefore it has no marine molluscs, only land and freshwater species, including snails, slugs, freshwater clams and freshwater mussels. There are 247 species of molluscs living in the wild in the Czech Republic. In addition there are at least 11 gastropod species surviving in greenhouses. There are 219 gastropod species (50 freshwater and 169 land species) and 28 bivalve species living in the wild. There are also 11 introduced gastropod species (5 freshwater and 7 land species) and 4 bivalve species living in the wild in the Czech Republic. This is a total of 9 freshwater non-indigenous species living in natural habitats. ;Summary table of number of species There are 2 endemic species of molluscs in the Czech Republic: *'' Alzoniella slovenica'' in Moravia (and in Slovakia too) *'' Bulgarica nitidosa'' in Bohemia. History Historical lists from 19th century or overviews of Czec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of Austria
The non-marine molluscs of Austria are a part of the fauna of Austria. Austria is land-locked and therefore it has no marine molluscs, only land and freshwater species. This list is based on the current Red List of Austrian molluscs.Reischütz, A. & P. L. Reischütz (2007): Rote Liste der Weichtiere (Mollusca) Österreichs. In: Zulka, P. (Ed.): Rote Listen gefährdeter Tiere Österreichs. Checklisten, Gefährdungsanalysen, Handlungsbedarf. Teil 2. Grüne Reihe des BLFUW, Wien, Böhlauverlag, pp 363 – 433 There are 443 species of non-marine molluscs living in Austria. Of these, 426 species live in the wild, 60 of which are endemic to Austria. At least 17 gastropod species live only as hothouse aliens in greenhouses, aquaria and terraria. Another 4 non-indigenous species occur only in hot springs. Freshwater gastropods Neritidae * '' Theodoxus danubialis'': ''Theodoxus danubialis danubialis'' (C. Pfeiffer, 1828); ''Theodoxus danubialis stragulatus'' (C. Pfeiffer, 1828) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of Germany
This list of non-marine molluscs of Germany is a list of the molluscs that live in Germany, except for the marine (saltwater) species. In other words, this list includes the land snails and slugs, the freshwater snails and the freshwater clams and mussels. There are 390 species (including subspecies) of molluscs living in the wild in Germany. In addition there is at least 1 gastropod species that lives only in greenhouses. There are ??? species of gastropods (69 species of freshwater gastropods, ??? species of land gastropods) and 36 species of bivalves living in the wild. There are 8 introduced species of gastropods (7 freshwater and 1 land species) and 1 species of non-indigenous bivalve living in the wild in Germany. That makes a total of 8 freshwater non-indigenous species of wild molluscs. ;Summary table of number of species There are only orders, families and species in the list. The German name is in brackets. Non-indigenous species only occurring greenhouses in Ger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Locality (biology)
In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen. A taxon is a scientifically named grouping of organisms with other like organisms, a set that includes some organisms and excludes others, based on a detailed published description (for example a species description) and on the provision of type material, which is usually available to scientists for examination in a major museum research collection, or similar institution. Type specimen According to a precise set of rules laid down in the International Code of Zoological Nomenclature (ICZN) and the International Code of Nomenclature for algae, fungi, and plants (ICN), the scientific name of every taxon is almost a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproductive System Of Gastropods
The reproductive system of gastropods (slugs and snails) varies greatly from one group to another within this very large and diverse taxonomic class of animals. Their reproductive strategies also vary greatly, see Mating of gastropods. In many marine gastropods there are separate sexes (male and female); most terrestrial gastropods however are hermaphrodites. Courtship is a part of the behaviour of mating gastropods. In some families of pulmonate land snails, one unusual feature of the reproductive system and reproductive behavior is the creation and utilization of love darts, the throwing of which has been identified as a form of sexual selection. Gastropods are defined as snails and slugs, belonging to a larger group called Molluscs. Gastropods have unique reproductive systems, varying significantly from one taxonomic group to another. They can be separated into three categories: marine, freshwater, and land. Reproducing in marine or freshwater environments makes getting s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dissection
Dissection (from Latin ' "to cut to pieces"; also called anatomization) is the dismembering of the body of a deceased animal or plant to study its anatomical structure. Autopsy is used in pathology and forensic medicine to determine the cause of death in humans. Less extensive dissection of plants and smaller animals preserved in a formaldehyde solution is typically carried out or demonstrated in biology and natural science classes in middle school and high school, while extensive dissections of cadavers of adults and children, both fresh and preserved are carried out by medical students in medical schools as a part of the teaching in subjects such as anatomy, pathology and forensic medicine. Consequently, dissection is typically conducted in a morgue or in an anatomy lab. Dissection has been used for centuries to explore anatomy. Objections to the use of cadavers have led to the use of alternatives including virtual dissection of computer models. Overview Plant and animal b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymorphism (biology)
In biology, polymorphism is the occurrence of two or more clearly different morphs or forms, also referred to as alternative ''phenotypes'', in the population of a species. To be classified as such, morphs must occupy the same habitat at the same time and belong to a panmictic population (one with random mating). Ford E.B. 1965. ''Genetic polymorphism''. Faber & Faber, London. Put simply, polymorphism is when there are two or more possibilities of a trait on a gene. For example, there is more than one possible trait in terms of a jaguar's skin colouring; they can be light morph or dark morph. Due to having more than one possible variation for this gene, it is termed 'polymorphism'. However, if the jaguar has only one possible trait for that gene, it would be termed "monomorphic". For example, if there was only one possible skin colour that a jaguar could have, it would be termed monomorphic. The term polyphenism can be used to clarify that the different forms arise from the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deroceras Reticulatum
''Deroceras reticulatum'', common names the "grey field slug" and "grey garden slug", is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusc in the family Agriolimacidae. This species is an important agricultural pest. Distribution ''Deroceras reticulatum'' is native to Europe, North Africa and the Atlantic Islands.Horsák M., Juřičková L. & Picka J. (2013). ''Měkkýši České a Slovenské republiky. Molluscs of the Czech and Slovak Republics''. Kabourek, Zlín, 264 pp. (in Czech and English). It occurs widely in Europe, but is more rare and restricted to cultivated fields in the southeast, particularly in the Balkans, and is probably absent from Greece and the Bulgarian mountains. In the north and central European lowlands, Great Britain, and Ireland, it is probably the most widely occurring slug. In northern Scandinavia it is scarce, and is mainly found as a synanthrope. This species occurs in countries and islands including: * Gre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deroceras Turcicum
''Deroceras turcicum'' is a species of air-breathing land slug, a terrestrial pulmonate gastropod mollusc in the family Agriolimacidae. Distribution It is found in Turkey and the more south eastern parts of Europe (Albania, Austria, Bulgaria, Greece, Hungary, Italy, Romania, countries of the area of the former Yugoslavia), extending as far north as the Czech Republic, Slovakia, Poland and Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian inv .... References Agriolimacidae Gastropods described in 1894 {{Agriolimacidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deroceras Praecox
''Deroceras praecox'' is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Agriolimacidae. Taxonomy When Wiktor (1966) described ''D. praecox'' he distinguished two forms on the basis of their genitalia. Later Wiktor (1973) realised that one of the forms of ''D. praecox'' that he had distinguished was synonymous with '' Deroceras rodnae'', described slightly earlier by Grossu & Lupu (1965). But the other form with a spiral end to its penis occupied a distinct range in the Sudeten mountains and neighboring areas; this is what is called ''D. praecox'' nowadays. It remains debatable whether ''D. praecox'' might be better viewed as a subspecies of ''D. rodnae'' ( Hutchinson & Reise, 2009). Note that the distinct differences in mating behaviour between ''D. praecox'' and ''D. rodnae'' that Reise (1995) reported turn out to refer to differences between ''D. praecox'' and a more distant species, '' Deroceras juranum'' ( Hutchinson & ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Type Locality (biology)")
