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。和本屬相似且相關的屬為假高圓球蟲（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 Paleobiology Database

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