棘球海膽（學名：Echinocorys），又名兜海膽，是一屬已滅絕的海膽，是白堊紀晚期海膽中最常見的一種，其化石主要分佈在北美。牠們延長的體殼很大，從側面看成錐狀，頂部經常是扁平的。表面覆蓋着小刺瘤，上面的棘刺纖細且很短。基座扁平，橢圓形的口位於前緣附近。牠們擁有巨大而延長的頂盤和長長的花瓣狀步帶。棘球海膽經常將部分身體埋於沙泥中，在其中犁行以尋找有營養的有機物。其標本體殼的頂部常破裂，很可能是食肉動物，諸如魚的攻擊造成的。[1][2]
物種
- Echinocorys belgicus Lambert, 1898
- Echinocorys darderi Lambert, 1935
- Echinocorys edhemi Bohm, 1927
- Echinocorys gravesii (Desor, 1847)
- Echinocorys katsharavai Tzaghareli, 1949
- Echinocorys lamberti Smiser, 1935
- Echinocorys legindensis Wind, 1959
- Echinocorys mamontoffi Charles, 1937
- Echinocorys obliquus Ravn, 1927
- Echinocorys ogormani Lambert, 1937
- Echinocorys ovatus (Leske, 1778)
- Echinocorys pentagonalis Kongiel, 1949
- Echinocorys pustulosus Leske, 1778
- Echinocorys renngarteni Moskvin & Poslavskaya, 1959
- Echinocorys semiglobosus Kongiel, 1949
- Echinocorys sulcatus Goldfuss, 1826-33
- Echinocorys sumbaricus Djabarov, 1968
- Echinocorys tenuituberculatus Leymerie, 1851
- Echinocorys yoloensis Anderson, 1958
參考文獻
外部連結
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