放射虫門(學名:Radiozoa)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。
此條目需要擴充。 (2013年2月13日) |
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,即所謂軸足(axopods),可承受放射蟲的浮力。
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1.褐囊虫目(Phaeodaria)
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11. Discoidea
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21. Acanthometra
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22. Spyroidea
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31. Cyrtoidea
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41. Acanthophracta
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51. Polycyttaria
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61.褐囊虫目(Phaeodaria)
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71. Stephoidea
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91.泡沫虫亞目(Spumellina)
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; et al. 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.
- Sina M. Adl; et al. 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.
- 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
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