| 词条 | Actinocyclus (diatom) |
| 释义 |
| name = Actinocyclus | image = Actinocyclus normannii.jpeg | image_caption = Actinocyclus normannii | domain = Eukaryota | unranked_regnum = SAR | superphylum = Heterokonta | classis = Bacillariophyceae | subclassis = Coscinodiscophycidae | superordo = Coscinodiscanae | ordo = Coscinodiscales | familia = Hemidiscaceae | genus = Actinocyclus | genus_authority = C. G. Ehrenberg, 1837 }}Actinocyclus is a genus of diatoms in the family Hemidiscaceae.[1][2] In 2006, a study was carried out which included finding traces of extinct Actinocylidae in Russia, which ultimately assisted geologists in dating its prevalence and significance to history. Out of 7236 samples found, they concluded that this species belongs to a group of known as Actinocyclus gorbunovii. Freshwater species of Actinocyclus were also found to have a major part in playing a stratigraphic marker, also known as an estimated time in which geologists can use to help order things in a sequence of events. Using K-Ar dating, scientists concluded that Actinocyclus species were found to be most optimal in the middle-age Miocene era.{{citation needed|date=December 2017}} References1. ^{{cite journal|last1=Villac|first1=M. C.|last2=Kaczmarska|first2=I.|last3=Ehrman|first3=J. M.|title=The diversity of diatom assemblages in ships' ballast sediments: colonization and propagule pressure on Canadian ports|journal=Journal of Plankton Research|date=18 September 2013|volume=35|issue=6|pages=1267–1282|doi=10.1093/plankt/fbt090}} 2. ^{{cite journal|last1=Usoltseva|first1=Marina|title=Morphology of Actinocyclus and Lobodiscus species (Bacillariophyta) from the Miocene deposits of the Vitim Plateau, Russia|date=2010|volume=143|pages=352–364|url=http://ucelinks.cdlib.org:8888/sfx_local?&url_ver=Z39.88-2004&url_ctx_fmt=info:ofi/fmt:kev:mtx:ctx&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Morphology%20of%20Actinocyclus%20and%20Lobodiscus%20species%20%28Bacillariophyta%29%20from%20the%20Miocene%20deposits%20of%20the%20Vitim%20Plateau%2C%20Russia&rft.aufirst=Marina&rft.aulast=Usoltseva&rft.date=2010&rft.eissn=2032-3921&rft.epage=364&rft.genre=article&rft.issn=2032-3913&rft.issue=3&rft.jtitle=Plant%20Ecology%20and%20Evolution&rft.pages=352-364&rft.spage=352&rft.volume=143&rfr_id=info:sid/www.isinet.com:WoK:BIOSIS&rft.au=Khursevish%2C%20Galina&rft.au=Rasskazov%2C%20Sergey&rft.au=Vorob%27eva%2C%20Svetlana&rft.au=Chernyaeva%2C%20Galina&rft_id=info:doi/10%2E5091%2Fplecevo%2E2010%2E410|accessdate=12 February 2015}} External links{{Commons category|Actinocyclus}}{{Taxonbar|from=Q48970555}}{{Diatom-stub}} 2 : Coscinodiscales|Coscinodiscophyceae genera |
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