The polycystines are a group of radiolarians. They include the vast majority of the fossil radiolaria, as their skeletons are abundant in marine sediments, making them one of the most common groups of microfossils. These skeletons are composed of opaline silica. In some it takes the form of relatively simple spicules, but in others it forms more elaborate lattices, such as concentric spheres with radial spines or sequences of conical chambers. Two of the orders belonging to this group are the radially-symmetrical Spumellaria, dating back to the late Cambrian period, and the bilaterally-symmetrical Nasselaria, whose origin is placed within the lower Devonian.[2]
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polycystine, polycystines, group, radiolarians, they, include, vast, majority, fossil, radiolaria, their, skeletons, abundant, marine, sediments, making, them, most, common, groups, microfossils, these, skeletons, composed, opaline, silica, some, takes, form, . The polycystines are a group of radiolarians They include the vast majority of the fossil radiolaria as their skeletons are abundant in marine sediments making them one of the most common groups of microfossils These skeletons are composed of opaline silica In some it takes the form of relatively simple spicules but in others it forms more elaborate lattices such as concentric spheres with radial spines or sequences of conical chambers Two of the orders belonging to this group are the radially symmetrical Spumellaria dating back to the late Cambrian period and the bilaterally symmetrical Nasselaria whose origin is placed within the lower Devonian 2 PolycystineSkeleton of a polycystineScientific classificationDomain EukaryotaClade DiaphoretickesClade SARPhylum RetariaSubphylum RadiolariaClass PolycystinaEhrenberg 1838 emend Haeckel 1887Orders 1 Collodaria Nassellaria SpumellariaThis article relies largely or entirely on a single source Relevant discussion may be found on the talk page Please help improve this article by introducing citations to additional sources Find sources Polycystine news newspapers books scholar JSTOR February 2022 An illustration of polycystines of the subclass Spumellaria from Ernst Haeckel s 1904 Kunstformen der Natur Artforms of Nature References edit WoRMS 2019 Polycystina Accessed at http www marinespecies org aphia php p taxdetails amp id 235740 on 2019 01 08 1 Mendez Sandin Diversity and Evolution of Nassellaria and Spumellaria Radiolaria Protistology Sorbonne Universite 2019 English Accessed at https tel archives ouvertes fr tel 03137926 file MENDEZ SANDIN Miguel 2019 pdf on 2022 10 18External links edit nbsp Data related to Polycystinea at Wikispecies Systematics of the Radiolaria Radiolaria org Polycystine radiolarians nbsp This Radiolarian related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Polycystine amp oldid 1130705687, wikipedia, wiki, book, books, library,
