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高圆球虫

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高圆球虫属
化石时期:中奥陶纪至晚志留纪
Sphaerexochus mirus
科学分类 编辑
界: 动物界 Animalia
门: 节肢动物门 Arthropoda
(未分级) 类肢类 Artiopoda
纲: 三叶虫纲 Trilobita
目: 镜眼虫目 Phacopida
科: 手尾虫科 Cheiruridae
属: 高圆球虫属 Sphaerexochus
Beyrich, 1845
模式种
Sphaerexochus mirus
Beyrich, 1845

见内文

高圆球虫学名Sphaerexochus),又名凸圆球虫,是生存于中奥陶纪至晚志留纪的一三叶虫,生活在浅礁石间,其化石分布于亚洲澳洲欧洲北美洲。这类三叶虫的外骨骼很长且呈凸状,有厚实的方解石外壳。其扁平的头鞍占据了整个宽阔的部,颊刺退化。胸部分为11节,中轴隆起而凸出,肋叶的末梢多刺且向下弯曲。短小的尾甲也长有刺。[1]和本属相似且相关的属为假高圆球虫Pseudosphaerexochus)。

物种

  • Sphaerexochus arenosis Chatterton and Ludvigsen 1977
  • Sphaerexochus arenosus Chatterton and Ludvigsen 1976
  • Sphaerexochus atacius Ludvigsen 1979
  • Sphaerexochus brandlyi Chatterton and Perry 1984
  • Sphaerexochus bridgei Cooper and Kindle 1936
  • Sphaerexochus britanicus Dean 1971
  • Sphaerexochus calvus Mc Coy 1846
  • Sphaerexochus dimorphus Whittington and Evitt 1953
  • Sphaerexochus eurys Tripp 1962
  • Sphaerexochus fibrisulcatus Lu 1975
  • Sphaerexochus glaber Holloway 1980
  • Sphaerexochus hapsidotus Whittington and Evitt 1953
  • Sphaerexochus hiratai Kobayashi and Hamada 1964
  • Sphaerexochus hisingeri Warburg 1925
  • Sphaerexochus johnstoni Chatterton and Perry 1984
  • Sphaerexochus laciniatus Lindström 1885
  • Sphaerexochus latifrons Angelin 1854
  • Sphaerexochus mirus Beyrich, 1845
  • Sphaerexochus molongloensis Chatterton and Campbell 1980
  • Sphaerexochus parvus Billings 1865
  • Sphaerexochus pulcher Whittington and Evitt 1953
  • Sphaerexochus romingeri Hall 1868
  • Sphaerexochus scabridus Angelin 1854
  • Sphaerexochus tuberculatus Warburg 1925
  • Sphaerexochus valcourensis Shaw and Bolton 2011

参考文献

  1. ^ Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 59. ISBN 0789489848. 

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