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拟海蕾

拟海蕾纲
化石时期:478.6–457.5 Ma
早奥陶世 - 中奥陶世[1]
科学分类 编辑
界: 动物界 Animalia
门: 棘皮动物门 Echinodermata
亚门: 海蕾亚门 Blastozoa
纲: 拟海蕾纲 Parablastoidea
Hudson, 1907[2]
[3]
  • 拟海蕾目 Parablastida
    • 科 Blastocystidae
    • 科 Meristoschismatidae

拟海蕾學名Parablastoidea)是一类已灭绝棘皮动物,生存于奥陶纪,化石主要產於北美[1][4]拟海蕾的外觀類似有莖(柄)的海星,利用莖固著在海底基質上。莖上連接萼部,萼呈梨形,由許多骨板英语Ossicle (echinoderm)(萼板)組成。口位於萼部口面中央,5條步帶英语Ambulacrum (anatomy)以口為中心像花瓣一樣輻射出,上有腕羽。步帶為蓋板所覆蓋,步帶板間有間輻板共5塊。反口面除底板、輻板各5塊外,尚有5對雙腕板和許多間腕板。[5]

[编辑]

本綱包括以下屬:[4]

  • Blastocystis
  • Blastoidocrinus
  • Cambroblastus
  • Eurekablastus
  • Meristoschisma
  • Pachyocrinus
  • Parabolablastus

参考文献

[编辑]
  1. ^ 1.0 1.1 Paleobiology Database: Parablastoidea.. [2024-05-08]. (原始内容存档于2024-01-03). 
  2. ^ George Henry Hudson. On Some Pelmatozoa from the Chazy Limestone of New York 107. 美國: Geological Papers. New York State Museum Bulletin. 1907: 97–152 [2024-05-08]. GHH1. (原始内容存档于2024-01-04) (英语). 
  3. ^ BioLib: Biological library - Parablastoidea. 
  4. ^ 4.0 4.1 Parablastoidea. Mindat.org. [2024-05-08]. (原始内容存档于2024-07-30). 
  5. ^ Parablastoidea - Encyclopedia.com. (原始内容存档于2021-02-25). 
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拟海蕾
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