高圓球蟲 物種 參考文獻 外部連結 导航菜单Sphaerexochus
手尾蟲科奧陶紀動物志留紀動物
見內文學名奧陶紀志留紀屬三葉蟲海礁石外骨骼方解石眉頭頰胸
高圓球蟲 化石時期: 中奧陶紀至晚志留紀 | ||||||||||||||||
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Sphaerexochus mirus | ||||||||||||||||
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模式種 | ||||||||||||||||
Sphaerexochus mirus Beyrich, 1845 | ||||||||||||||||
種 | ||||||||||||||||
見內文 |
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,生活在淺海礁石上或四周。這類三葉蟲的外骨骼呈凸狀且很長,有厚實的方解石外殼。微微隆起的中心裂片特別凸出,扁平的眉間佔據了整個寬闊的頭部。牠們頰部的棘已退化。胸部分為11節,並有向下彎曲的多刺側板末梢。短小的尾甲也長有刺。[1]和本屬相似且相關的屬是Pseudosphaerexochus。
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 in the Paleobiology Database