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岔线海扇 Camptonectes 属是侏罗纪全世界分布的双壳类化石之一,具有重要的地层对比意义;本文以近两年(1984—1985)来采自唐古拉地区的岔线海扇和西藏的一些化石标本为基础,对该属所包括的亚属和一些种进行比较详细的讨论,旨在探讨它们在我国海相侏罗纪地层对比中的一些问题。 Camptonectes 是由 Meek(1864)根据 Agassiz 手稿中对该属作出的定义和确立的属型种于同年正式建立的。
The Camptonectes genera is one of the bifurcated fossils distributed throughout the world in the Jurassic. It has important stratigraphic contrasting significance. In the recent two years (1984-1985), Camptonectes were collected from the forkhead sea-fan in the Tangula region and some fossils in Tibet Based on the specimens, the subgenus and some species included in this genus were discussed in detail in order to probe into some of their problems in the marine Jurassic strata. Camptonectes was formally established by Meek (1864) in the same year according to the genus Agrifiz’s definition and establishment of the genus.