高圓球蟲

高圓球蟲（學名：），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。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

外部連結 
 Sphaerexochus  in the 

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