放射蟲
















 

放射蟲亞門
化石時期: 寒武纪—现在

Radiolaria illustration from the Challenger Expedition 1873-76.
Radiolaria illustration from the Challenger Expedition 1873-76.


科學分類






















域:

真核生物域(Eukaryota


(未分级)

SAR超類群(SAR supergroup


(未分级)

有孔蟲界(Rhizaria

門:

有孔蟲類門英语RetariaRetaria
Müller 1858 emend.

亞門:

放射蟲亞門Radiolaria







  • 多孔蟲綱英语PolycystinePolycystinea


  • 等輻骨蟲綱英语AcanthareaAcantharea

  • Sticholonchea英语Sticholonche



放射虫亞門(學名:Radiolaria)又名放線蟲,為海中浮游生物,有如球形對稱,帶有矽殼,殼上有美麗的花紋。


身体内有膜质中央囊,囊面穿有许多小孔,将身体分为内外两部分,外部被胶状物质,多有液泡,内部有细胞核、液泡和赤、黄等色的油滴;通常均由身体中央射出针状骨棘,间或多数针状物相集成层或互相连络而成笼状,形状精细繁多;多以分裂法繁殖,也有以孢子繁殖的。


放射虫多产于热带海洋中,因為迅速的繁殖與過多的物種,是診斷化石的重要依據,可從寒武紀開始。


放射蟲有很多針狀偽足的支援,即所謂axopods,可承受放射蟲的浮力。




參考文獻





  • Zettler, Linda A. Phylogenetic relationships between the Acantharea and the Polycystinea: A molecular perspective on Haeckel's Radiolaria. Proceedings of the National Academy of Sciences. 1997, 94: 11411–11416. doi:10.1073/pnas.94.21.11411. 


  • P. Lopez-Garcia; 等. Toward the Monophyly of Haeckel's Radiolaria: 18S rRNA Environmental Data Support the Sisterhood of Polycystinea and Acantharea. Molecular Biology and Evolution. 2002, 19 (1): 118–121.  引文格式1维护:显式使用等标签 (link)


  • Sina M. Adl; 等. The New Higher Level Classification of Eukaryotes with Emphasis on the Taxonomy of Protists. Journal of Eukaryotic Microbiology. 2005, 52 (5): 399–451. doi:10.1111/j.1550-7408.2005.00053.x.  引文格式1维护:显式使用等标签 (link)


  • Haeckel, Ernst. Art Forms from the Ocean: The Radiolarian Atlas of 1862. Munich; London: Prestel Verlag. 2005. ISBN 3-7913-3327-5. 




外部連結







  • Radiolarians

  • Geometry and Pattern in Nature 3: The holes in radiolarian and diatom tests

  • Radiolaria.org

  • Ernst Haeckel: Die Radiolarien (RHIZOPODA RADIARIA) Berlin, 1862

  • Radiolaria - Droplet









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