|
Meara (worm)
''Meara '' is a genus of bilaterally symmetric, small aquatic worms in the phylum Acoelomorpha. This genus contains only one 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 ..., ''Meara stichopi'', a parasite of the sea cucumber '' Parastichopus tremulus''. It occurs in Norway and Sweden.Tyler, S., Artois, T.; Schilling, S.; Hooge, M.; Bush, L.F. (eds) (2006-2018). World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora. Meara stichopi Westblad, 1949. Accessed at: http://marinespecies.org/turbellarians/aphia.php?p=taxdetails&id=142803 on 2019-07-20 References {{Xenacoelomorpha-stub Acoelomorphs Fauna of Norway Fauna of Sweden Animals described in 1949 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stichopus Tremulus From Gullmarsfjorden At Göteborgs Naturhistoriska Museum 7940
''Stichopus'' is a genus of sea cucumbers from the family Stichopodidae. Description and characteristics Sources disagree about how many species should be classified in the genus. By 1922 there were about 20 described.James, D. B. (1998)On a little known holothurian ''Stichopus vastus'' Sluiter with notes on other species of ''Stichopus'' from the seas around India.Marine Fisheries Information Service. Central Marine Fisheries Research Institute. Cochin, India. Current species counts range from about 8 to 14.Hansson, H. (2013)''Stichopus'' Brandt, 1835.World Register of Marine Species. Accessed on 8 June 2013. A number of animals have been moved to other genera, such as ''Apostichopus'' and '' Isostichopus''. These sea cucumbers are relatively large. One of the largest is ''S. vastus'', which can reach 40 to 50 centimeters in length. They have soft, quadrangular bodies covered on all four sides with thick tubercles. Some of them can be quite variable, especially in their colora ... [...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] |
Acoelomorpha
Acoelomorpha is a subphylum of very simple and small soft-bodied animals with planula-like features which live in marine or brackish waters. They usually live between grains of sediment, swimming as plankton, or crawling on other organisms, such as algae and corals.Cannon, L. R. G. (1986) ''Turbellaria of the World. A guide to families and genera''. Brisbane, Queensland Museum, 136 p. With the exception of two acoel freshwater species, all known Acoelomorphs are marine. Systematics Etymology The term "acoelomorph" derives from the Ancient Greek words (), the ''alpha privative'', expressing negation or absence, (), meaning "cavity", and (), meaning "form". This refers to the fact that acoelomorphs have a structure lacking a fluid-filled body cavity. Classification The subphylum Acoelomorpha is divided into two classes. There are at least 408 described species, with a majority of these falling within the Crucimusculata infraorder in Acoela. * Acoela comprise small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Taxon
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. In contrast, an oligotypic taxon contains more than one but only a very few subordinate taxa. Examples Just as the term ''monotypic'' is used to describe a taxon including only one subdivision, the contained taxon can also be referred to as monotypic within the higher-level taxon, e.g. a genus monotypic within a family. Some examples of monotypic groups are: Plants * In the order Amborellales, there is only one family, Amborellaceae and there is only one genus, '' Amborella'', and in this genus there is only one species, namely ''Amborella trichopoda.' ... [...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] |
Fauna Of Norway
Fauna of Norway may refer to: * List of birds of Norway * List of mammals of Norway The following is a list of mammals with non-domesticated populations in Norway. Insectivores Hedgehogs *European hedgehog, ''Erinaceus europaeus'' Shrews *Eurasian water shrew, ''Neomys fodiens'' *Common shrew, ''Sorex araneus'' * Laxmann's s ... See also * Outline of Norway {{Short pages monitor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fauna Of Sweden
Fauna of Sweden may refer to: * List of amphibians and reptiles of Sweden * List of birds of Sweden * List of mammals of Sweden There are 84 mammal species (with two uncertain) recorded in Sweden according to the IUCN Red List. Two are endangered, one is vulnerable as well now extinct, and four are near threatened. The following tags are used to highlight each species' ... See also * Outline of Sweden Fauna of Sweden {{Sweden-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
