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Anheteromeyenia Cheguevarai
''Anheteromeyenia'' is a genus of freshwater sponge. It has been recorded in the Nearctic, the Neotropics. This taxon was initially a subgenus of ''Heteromeyenia'' when K. Schöder circumscribed it in 1927, but W. M. de Laubenfels made it a genus in its own right in 1936. , WoRMS recognizes the following species: * '' Anheteromeyenia argyrosperma'' * '' Anheteromeyenia cheguevarai'' * ''Anheteromeyenia diamantina ''Anheteromeyenia'' is a genus of freshwater sponge. It has been recorded in the Nearctic, the Neotropics. This taxon was initially a subgenus of ''Heteromeyenia'' when K. Schöder circumscribed it in 1927, but W. M. de Laubenfels made it a genu ...'' * '' Anheteromeyenia ornata'' * '' Anheteromeyenia vitrea'' References Further reading * {{Demosponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemmule
Gemmules are internal buds found in sponges and are involved in asexual reproduction. It is an asexually reproduced mass of cells, that is capable of developing into a new organism i.e., an adult sponge. Role in asexual reproduction Asexual reproduction in sponges occurs via budding, either by external or internal buds. The internal buds are called gemmules. Only endogenous types of buds develop into new sponges. Characteristics Gemmules are resistant to desiccation (drying out), freezing, and anoxia (lack of oxygen) and can lie around for long periods of time. Gemmules are analogous to a bacterium's endospore and are made up of amoebocytes surrounded by a layer of spicules Spicules are any of various small needle-like anatomical structures occurring in organisms Spicule may also refer to: *Spicule (sponge), small skeletal elements of sea sponges *Spicule (nematode), reproductive structures found in male nematodes ( ... and can survive conditions that would kill adult spo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spicule (sponge)
Spicules are structural elements found in most Sea sponge, sponges. The meshing of many spicules serves as the sponge's skeleton and thus it provides structural support and potentially defense against predators. Sponge spicules are made of calcium carbonate or Silicon dioxide, silica. Large spicules visible to the naked eye are referred to as megascleres, while smaller, microscopic ones are termed microscleres. The composition, size, and shape of spicules are major characters in sponge systematics and Taxonomy (biology), taxonomy. Overview Sponges are a species-rich clade of the earliest-diverging (most Basal (phylogenetics), basal) animals. They are distributed globally, with diverse ecologies and functions, and a record spanning at least the entire Phanerozoic. Most sponges produce skeletons formed by spicules, structural elements that develop in a wide variety of sizes and three dimensional shapes. Among the four sub-clades of Porifera, three (Demospongiae, Hexactinelli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sponge
Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes. Sponges were first to branch off the evolutionary tree from the last common ancestor of all animals, making them the sister group of all other animals. Etymology The term ''sponge'' derives from the Ancient Greek word ( 'sponge'). Overview Sponges are similar to other animals in that they are multicellular, he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nearctic
The Nearctic realm is one of the eight biogeographic realms constituting the Earth's land surface. The Nearctic realm covers most of North America, including Greenland, Central Florida, and the highlands of Mexico. The parts of North America that are not in the Nearctic realm are Eastern Mexico, Southern Florida, coastal Central Florida, Central America, and the Caribbean islands, which, together with South America, are part of the Neotropical realm. Major ecological regions The World Wildlife Fund (WWF) divides the Nearctic into four bioregions, defined as "geographic clusters of ecoregions that may span several habitat types, but have strong biogeographic affinities, particularly at taxonomic levels higher than the species level (genus, family)." Canadian Shield The Canadian Shield bioregion extends across the northern portion of the continent, from the Aleutian Islands to Newfoundland. It includes the Nearctic's Arctic Tundra and Boreal forest ecoregions. In terms of flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neotropics
The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropics, tropical Ecoregion#Terrestrial, terrestrial ecoregions of the Americas and the entire South American temperate climate, temperate zone. Definition In biogeography, the Neotropic or Neotropical realm is one of the eight terrestrial realms. This realm includes South America, Central America, the Caribbean islands, and southern North America. In Mexico, the Yucatán Peninsula and southern lowlands, and most of the east and west coastlines, including the southern tip of the Baja California Peninsula are Neotropical. In the United States southern Florida and coastal Central Florida are considered Neotropical. The realm also includes temperate southern South America. In contrast, the Neotropical Phytochorion, Floristic Kingdom excludes southernmost South America, which instead is placed in the Antarctic Floristic Kingdom, Antarctic kingdom. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heteromeyenia
''Heteromeyenia'' is a genus of sponges belonging to the family Spongillidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The ext .... Species: *'' Heteromeyenia baileyi'' *'' Heteromeyenia barlettai'' *'' Heteromeyenia cristalina'' *'' Heteromeyenia horsti'' *'' Heteromeyenia insignis'' *'' Heteromeyenia latitenta'' *'' Heteromeyenia longistylis'' *'' Heteromeyenia repens'' *'' Heteromeyenia stepanowii'' *'' Heteromeyenia tentasperma'' *'' Heteromeyenia tubisperma'' References {{Taxonbar, from=Q4118218 Spongillidae Sponge genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circumscription (taxonomy)
In biological taxonomy, circumscription is the content of a taxon, that is, the delimitation of which subordinate taxa are parts of that taxon. If we determine that species X, Y, and Z belong in Genus A, and species T, U, V, and W belong in Genus B, those are our circumscriptions of those two genera. Another systematist might determine that T, U, V, W, X, Y, and Z all belong in genus A. Agreement on circumscriptions is not governed by the Codes of Zoological or Botanical Nomenclature, and must be reached by scientific consensus. A goal of biological taxonomy is to achieve a stable circumscription for every taxon. This goal conflicts, at times, with the goal of achieving a natural classification that reflects the evolutionary history of divergence of groups of organisms. Balancing these two goals is a work in progress, and the circumscriptions of many taxa that had been regarded as stable for decades are in upheaval in the light of rapid developments in molecular phylogenetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WoRMS
Worms may refer to: *Worm, an invertebrate animal with a tube-like body and no limbs Places *Worms, Germany, a city **Worms (electoral district) *Worms, Nebraska, U.S. *Worms im Veltlintal, the German name for Bormio, Italy Arts and entertainment * ''Worms'' (film), a 2013 Brazilian animated film * ''Worms'' (series), a series of video games, including: ** ''Worms'' (1995 video game), the first game in the series ** ''Worms'' (2007 video game), for Xbox Live Arcade, PlayStation Network, and iOS *''Worms?'', 1983 computer game Other uses *Worms (infection), common name for Helminthiasis *Parasitic worms (other) *Worms (surname), a surname *World Register of Marine Species (WoRMS) See also * *Worm (other) * Diet of Worms (other) *Worms & Cie Sequana Capital was a French pulp and paper company. History The company was founded as a coal importing business known as Worms and Cie in 1848. After diversifying into banking and finance it acquired Arjo W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anheteromeyenia Argyrosperma
''Anheteromeyenia argyrosperma'' is a freshwater sponge Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through t ... found across North America. Geographical range Nearctic region from Canada (Quebec, New Brunswick) to Florida and northern Alaska to southern California. Habitat ''Anheteromeyenia argyrosperma'' is found in both lotic (flowing water) and lentic (still) habitats. Typically in waters of about neutral pH with low to moderate alkalinity and high conductivity; in temperatures of 9 to 23 °C. They are sessile suspension feeders that attach to submerged surfaces such as rocks and logs in most inland habitats. Diet Sponges filter the water through them to collect numerous species of smaller organisms such as bacteria and protozoa. ''Anheteromeyenia argyrosperma'' are especially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anheteromeyenia Cheguevarai
''Anheteromeyenia'' is a genus of freshwater sponge. It has been recorded in the Nearctic, the Neotropics. This taxon was initially a subgenus of ''Heteromeyenia'' when K. Schöder circumscribed it in 1927, but W. M. de Laubenfels made it a genus in its own right in 1936. , WoRMS recognizes the following species: * '' Anheteromeyenia argyrosperma'' * '' Anheteromeyenia cheguevarai'' * ''Anheteromeyenia diamantina ''Anheteromeyenia'' is a genus of freshwater sponge. It has been recorded in the Nearctic, the Neotropics. This taxon was initially a subgenus of ''Heteromeyenia'' when K. Schöder circumscribed it in 1927, but W. M. de Laubenfels made it a genu ...'' * '' Anheteromeyenia ornata'' * '' Anheteromeyenia vitrea'' References Further reading * {{Demosponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anheteromeyenia Diamantina
''Anheteromeyenia'' is a genus of freshwater sponge. It has been recorded in the Nearctic, the Neotropics. This taxon was initially a subgenus of ''Heteromeyenia'' when K. Schöder circumscribed it in 1927, but W. M. de Laubenfels made it a genus in its own right in 1936. , WoRMS Worms may refer to: *Worm, an invertebrate animal with a tube-like body and no limbs Places *Worms, Germany, a city **Worms (electoral district) *Worms, Nebraska, U.S. *Worms im Veltlintal, the German name for Bormio, Italy Arts and entertainme ... recognizes the following species: * '' Anheteromeyenia argyrosperma'' * '' Anheteromeyenia cheguevarai'' * '' Anheteromeyenia diamantina'' * '' Anheteromeyenia ornata'' * '' Anheteromeyenia vitrea'' References Further reading * {{Demosponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anheteromeyenia Ornata
''Anheteromeyenia'' is a genus of freshwater sponge. It has been recorded in the Nearctic, the Neotropics. This taxon was initially a subgenus of ''Heteromeyenia'' when K. Schöder circumscribed it in 1927, but W. M. de Laubenfels made it a genus in its own right in 1936. , WoRMS recognizes the following species: * '' Anheteromeyenia argyrosperma'' * ''Anheteromeyenia cheguevarai'' * ''Anheteromeyenia diamantina ''Anheteromeyenia'' is a genus of freshwater sponge. It has been recorded in the Nearctic, the Neotropics. This taxon was initially a subgenus of ''Heteromeyenia'' when K. Schöder circumscribed it in 1927, but W. M. de Laubenfels made it a genu ...'' * '' Anheteromeyenia ornata'' * '' Anheteromeyenia vitrea'' References Further reading * {{Demosponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
