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Lingulids: the Evolutionary "Living Fossils"
Author(s): 
Pages: 201-203,彩3-彩4
Year: Issue:  4
Journal: Chinese Journal of Nature

Abstract: 舌形贝(Lingulidae)最早出现在寒武纪早期,因其壳体外形与现代舌形贝相似,通常被认为是活化石,但形态解剖研究表明澄江化石库舌形贝属Lingulella和Lingulellotreta与现代舌形贝Lingula在脉管系统、刚毛排列和内脏区分布,以及生活方式方面存在较大差别,进而表明了"活化石"在漫长的地质历史中也存在一定的环境适应性改变.
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