Dendya Clathrata

	Dendya Clathrata ''Dendya clathrata'' is a species of calcareous sponge in the family Dendyidae Dendyidae is a family of calcareous sponges, which six genera Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial no .... References Clathrinida Sponges described in 1883 {{calcarea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Species 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. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists 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. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Calcareous Sponge The calcareous sponges or calcereans are sponges that make up the class Calcarea, characterized by spicules made of calcium carbonate in the form of high-magnesium calcite or aragonite. While the spicules in most species are triradiate (with three points in a single plane), some species may possess two- or four-pointed spicules.''Treatise on Invertebrate Paleontology'' Part E, Revised. Porifera, Volume 3: Classes Demospongea, Hexactinellida, Heteractinida & Calcarea, xxxi + 872 p., 506 fig., 1 table, 2004, availablhere .''Treatise on Invertebrate Paleontology'' Part E, Revised. Porifera, Volumes 4 & 5: Hypercalcified Porifera, Paleozoic Stromatoporoidea & Archaeocyatha, liii + 1223 p., 665 figs., 2015, availablhere . Unlike the far more common siliceous sponges, calcareans lack microscleres, tiny spicules which reinforce the flesh. In addition, their spicules develop from the outside-in, mineralizing within a hollow organic sheath. Biology All sponges in this class are strictly m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Dendyidae Dendyidae is a family of calcareous sponges, which six genera Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s .... Dendyidae contains the following genera: * ''Genus: Ascandra'' * Genus '' Dendya'' * Genus: '' Leuclathrina'' Genus: '' Neoernsta'' Genus '' Robspongia'' Genus '' Soleneiscus'' References Clathrinida Sponge families {{calcarea-stub ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Clathrinida Overview The Clathrinida are an order of calcareous sponges found in marine environments. Clathrinida is a well-known non-monophyletic order under the class of calcarea, and was first named in 1958 by Willard D Hartman based on corticalization (body cortex) The fossil record of calcarea is relatively poor due to the nature of sponge – the fossil remains often don’t have the diagnostic spicules – but it’s certain that they are common in the Paleozoic and Mesozoic but rare in the Cenozoic These sponges have an asconoid structure and lack a true dermal membrane or cortex. The spongocoel is lined with choanocytes. One of the most famous species of Clathrinida is lemon sponge, featuring a bright yellow color and a slightly elongated-globular growth form Basic Structure The Clathrinida is a rich and variable tubular marine sponge with calcareous skeletons. The sponge is organized into simple tubes called the olynthus with an internal and external layer. Both layers ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]