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通过对侏罗纪扩散能力较强的海扇类双壳类分布历史的追溯发现:双壳类 Chlamys（Chlamys）valoniensis（Defrance）,Camptonectes（Camptonectes）auritus（von Schlotheim）和Chlamys（Chlamys）textoria（von Schlotheim）最早诞生于欧洲西部三叠纪末瑞替期或侏罗纪最早期赫塘期初,紧接着于赫塘期或稍晚时代通过西班牙通道扩散到了古太平洋东岸。这一研究结果,证明了西班牙陆表海海路早至赫塘期或更早期就已沿着泛大陆解体的破裂带形成,并从此沟通了西特提斯与古东太平洋,为特提斯和古太平洋生物群的互相迁移和交流提供了通道.
A retrospective study on the history of the distribution of bivalve species of the genus Sciropus showed that the Jurassic diffusivities were strong: Chlamys valoniensis (Defrance), Camptonectes (Camptonectes) auritus (von Schlotheim) and Chlamys (Chlamys) textoria von Schlotheim) was first born in the Triassic Late Retires in western Europe or the beginning of the early Jurassic period of Xitang, then spread to the east coast of the ancient Pacific Ocean through the Spanish Channel in the period of Kitang or later. The results of this study demonstrate the formation of a rupture zone along the continental shelf that had been transplanted as far back as Hetang or earlier as the Luhaihai Sea Route in Spain and have since communicated with the Western Tethys and the ancient eastern Pacific for the Tethys and the ancient Pacific Biota provides a channel for mutual migration and exchange.