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湖北省丹江口市温家坪剖面晚白垩世晚期胡岗组上部紫红色砂质泥岩中含丰富的恐龙蛋壳碎片.运用环境扫描电子显微镜,在保存良好的恐龙蛋壳柱状层中发现了大量的石内真菌.这些石内真菌以不同的角度钻掘寄主,并有选择地富集在恐龙蛋壳柱状层差的生物结晶带内.单个石内真菌呈针状、带状、丝状,长5~18μm,基部宽0.3~0.5μm,不分叉.石内真菌与寄主有相同的石化特征、脆性断口、质地和主要化学成分.石内真菌的主要成分为氧、碳和钙,次要成分为钠、钾、氯和硫.认为石内真菌入侵恐龙蛋的时间发生在恐龙蛋形成后和石化作用前,白垩纪末期石内真菌入侵恐龙蛋,致使其不能正常孵化和夭折可能是导致恐龙大绝灭的直接原因.
The Wenjiaping section of Danjiangkou in Hubei Province is rich in dinosaur eggshell fragments in the upper purple red sandy mudstone of the Upper Cretaceous in the late Cretaceous. Using environmental scanning electron microscopy, a large amount of Within the stone fungi, these fungi inside the stone drill the host at different angles and are selectively enriched in the biological crystal bands of the columnar layer of the dinosaur egg shell.The fungi in a single stone are acicular, banded, filamentous, long 5 ~ 18μm, the base width of 0.3 ~ 0.5μm, no bifurcation. The fungi in the stone and the host have the same petrochemical characteristics, brittle fracture, texture and main chemical composition. The main fungi in the stone are oxygen, carbon and calcium, The components are sodium, potassium, chlorine and sulfur .It is believed that the invagination of dinosaur eggs by the fungi in the rock occurred before and after the dinosaur eggs were formed and fungi invaded the dinosaur eggs at the end of the Cretaceous so that their inability to properly hatch and die may be caused The direct cause of the extinction of the dinosaurs.