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长刺大孢(Grandispora longa Chi and Hillis,1976)化石标本。产自甘肃文县—碧口镇的剖面。在碧口群和横丹群的粉砂质和泥质板岩中发现众多的孢子化石,证明该地层
Fossil specimens of Grandispora longa Chi and Hillis (1976). Production from Gansu Wenxian - Bikou section. A large number of spore fossils were found in the silty and argillaceous slate of Bikou and Hengdan groups,