高圆球虫
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属三叶虫，生活在浅海礁石间，其化石分布于亚洲、澳洲、欧洲及北美洲。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头部，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）。
高圆球虫属 | |
|---|---|
| |
| Sphaerexochus mirus | |
科学分类 
| |
| 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
| |
| 种 | |
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
- ^ Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 59. ISBN 0789489848.
外部链接
- Sphaerexochus （页面存档备份，存于互联网档案馆） in the Paleobiology Database