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Agelas Dispar
''Agelas dispar'' is a species of demosponge in the family Agelasidae. It lives on shallow-water reefs in the Caribbean Sea and around the West Indies. Taxonomy ''Agelas dispar'' is the type species of the genus and was first described in 1864 by the French naturalist Édouard Placide Duchassaing de Fontbressin and the Italian naturalist Giovanni Michelotti. They deposited the holotype in Amsterdam. In 1932, the zoologists M. Burton and H.S. Rao, unaware that the holotype was still in existence, deposited a neotype in the Natural History Museum in London, but this specimen has since disappeared. Description ''Agelas dispar'' forms massive irregularly-shaped, sometimes bulbous mounds or may be encrusting. It can grow to as much as across. The consistency is spongy but firm; the surface is smooth with many exhalent pores of irregular shape and size, often in shallow pits. The colour externally is pinkish-brown, reddish-brown or deep brown. Internally there are large cavities, man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Édouard Placide Duchassaing De Fontbressin
Édouard Placide Duchassaing de Fontbressin (1819 in Moule, Guadeloupe – 1873 in PĂ©rigueux) was a French naturalist. He is noted for his work in botany and spongiology. A native of Guadeloupe, he studied zoology, geology and medicine in Paris. Afterwards, he returned to Guadeloupe as a physician, spending his free time conducting research of the island's flora. Subsequently, he visited several other islands of the Antilles, eventually relocating as a physician to Santa Marta, Panama (1848), from where he studied the natural history of the isthmus, sending his plant specimens to Wilhelm Gerhard Walpers, a botanist in Berlin (these specimens later became the property of August Grisebach).JSTOR Global Plants biography Around 1850, he obtained a medical degree at |
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] |
Demosponge
Demosponges (Demospongiae) are the most diverse class in the phylum Porifera. They include 76.2% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database). They are sponges with a soft body that covers a hard, often massive skeleton made of calcium carbonate, either aragonite or calcite. They are predominantly leuconoid in structure. Their "skeletons" are made of spicules consisting of fibers of the protein spongin, the mineral silica, or both. Where spicules of silica are present, they have a different shape from those in the otherwise similar glass sponges. Some species, in particular from the Antarctic, obtain the silica for spicule building from the ingestion of siliceous diatoms. The many diverse orders in this class include all of the large sponges. Most are marine dwellers, but one order ( Spongillida) live in freshwater environments. Some species are brightly colored, with great variety in body shape; the largest species are ove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agelasidae
Agelasida is an order of sea sponges 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 ... in the class Demospongiae.van Soest, R. (2015)Agelasida.In: Van Soest, R.W.M; Boury-Esnault, N.; Hooper, J.N.A.; RĂĽtzler, K.; de Voogd, N.J.; Alvarez de Glasby, B.; Hajdu, E.; Pisera, A.B.; Manconi, R.; Schoenberg, C.; Klautau, M.; Picton, B.; Kelly, M.; Vacelet, J.; Dohrmann, M.; DĂaz, M.-C.; Cárdenas, P.; Carballo, J. L. (2016). World Porifera database. Accessed through: World Register of Marine Species on 2017-02-17. References External links * Sponge orders {{demosponge-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
