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Halisarca Dujardini
Halisarcidae is a family of sea sponges within the order Chondrillida. Members of the family are characterised by having long tubular, branched choanocyte chambers; they have no 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 ( ... which makes it difficult to determine the group's affinities with other sponge families. Halisarcidae is a monogeneric family, the only genus being ''Halisarca''.Vacelet, J.; Donadey, C. (1987). A new species of ''Halisarca'' (Porifera, Demospongiae) from the Caribbean, with remarks on the cytology and affinities of the genus. In: Jones WC (ed) European contributions to the taxonomy of sponges. Publications of the Sherkin Island Marine Station. 1, 5-12. See also *'' Halisarca caerulea'' References {{poriferan-stub Demospongiae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eduard Oscar Schmidt
Eduard Oscar Schmidt (21 February 1823, in Torgau – 17 January 1886, in Kappelrodeck) was a German zoologist and phycologist. Biography He initially studied mathematics and science at Halle, then continued his education in Berlin, where he came under the influence of Christian Gottfried Ehrenberg and Johannes Peter Müller. In 1847 he received his habilitation at the University of Jena, becoming an associate professor during the following year. In 1855 was he appointed professor of zoology at the University of Cracow. Later he taught classes at the Universities of Graz (from 1857) and Strasbourg (from 1872). Schmidt was an early proponent of Darwinian evolutionary thought. He is remembered for his research of Porifera (sponges), particularly species from the Adriatic Sea. Schmidt also made contributions in the field of phycology. As far back as 1862 Oscar Schmidt showed that "cuttings" of sponges will attach themselves and grow. This idea was followed through in the exp ... [...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] |
Chondrillida
Chondrosiida is an order of sea sponges within the subclass Verongimorpha Verongimorpha is the name of a subclass of sea 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 .... References Verongimorpha Sponge orders {{Poriferan-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sponge Spicule
Spicules are structural elements found in most 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 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. Overview Sponges are a species-rich clade of the earliest-diverging (most 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, Hexactinellida, and Homoscleromorpha) produce skeletons of amorphous silica and on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halisarca Caerulea
''Halisarca caerulea'' is a species of sponge in the family Halisarcidae. It is native to the Caribbean Sea and was first described in 1987 by the French marine biologists Jean Vacelet and Claude Donadey. Description ''Halisarca caerulea'' is a thinly encrusting species forming patches about thick. The texture is fleshy, and the skin is strengthened by the presence of bundles of collagen fibres which give a reticulated pattern to the smooth, slightly slimy surface. This sponge has long tubular, choanocyte chambers, which are sometimes branched, and no spicules. The oscula are about in diameter, each being at the centre of a conspicuous star-shaped group of superficial canals. These star-shaped systems are separated by smooth areas and are regularly arranged over the surface of the sponge, which is a bright blue colour in living specimens. Ecology Sponges feed by drawing water in through small pores, filtering out the bacteria and organic particles and pumping the water out t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
