高圓球蟲

高圓球蟲學名Sphaerexochus),又名凸圓球蟲,是生存於中奧陶紀至晚志留紀的一三葉蟲,生活在淺礁石間,其化石分佈於亞洲澳洲歐洲北美洲。這類三葉蟲的外骨骼很長且呈凸狀,有厚實的方解石外殼。其扁平的頭鞍佔據了整個寬闊的部,頰刺退化。胸部分為11節,中軸隆起而凸出,肋葉的末梢多刺且向下彎曲。短小的尾甲也長有刺。[1]和本屬相似且相關的屬為假高圓球蟲Pseudosphaerexochus)。

高圆球虫属
化石时期:中奧陶紀至晚志留紀
Sphaerexochus mirus
科学分类 编辑
界: 动物界 Animalia
门: 节肢动物门 Arthropoda
(未分级) 類肢類 Artiopoda
纲: 三叶虫纲 Trilobita
目: 鏡眼蟲目 Phacopida
科: 手尾虫科 Cheiruridae
属: 高圆球虫属 Sphaerexochus
Beyrich, 1845
模式種
Sphaerexochus mirus
Beyrich, 1845

見內文

物種

  • 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

參考文獻

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

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