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屬三葉蟲,生活在淺海礁石間,其化石分佈於亞洲、澳洲、歐洲及北美洲。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頭部,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)。
高圓球蟲屬 | |
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Sphaerexochus mirus | |
科學分類 | |
界: | 動物界 Animalia |
門: | 節肢動物門 Arthropoda |
(未分級): | †類肢類 Artiopoda |
綱: | †三葉蟲綱 Trilobita |
目: | †鏡眼蟲目 Phacopida |
科: | †手尾蟲科 Cheiruridae |
屬: | †高圓球蟲屬 Sphaerexochus Beyrich, 1845 |
模式種 | |
Sphaerexochus mirus Beyrich, 1845
| |
種 | |
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
- ^ Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 59. ISBN 0789489848.
外部連結
- Sphaerexochus (頁面存檔備份,存於互聯網檔案館) in the Paleobiology Database