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来自维基百科,自由的百科全书
疣海膽(學名:Phymosoma),又名瘤海膽,是一屬已滅絕的海膽。牠們生存於白堊紀至始新世,分佈在亞洲、歐洲及北美。牠們的體殼為扁圓形。頂盤和口周圍的膜所佔據的部分很寬闊。步帶與間步帶的刺瘤大小相近,刺瘤上長有光滑的圓柱形或扁平的錐狀棘刺。疣海膽生活在海底,透過啃咬堅硬的表面來取食海藻、海綿和其他軟體生物。[1][2]
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