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首次报道了东秦岭造山带奥陶系两岔口组中的牙形刺化石９个属。其组合面貌具有中奥陶世晚期牙形刺的特色，总体可与河南荆关一带寺岗组和陕西耀县一带桃启坡组中的牙形刺对比。
For the first time, nine genera of conodont fossils in the Ordovician two fork group of the East Qinling orogen were reported. Its combination features the characteristics of the late Ordovician conodonts, and can be compared with the conodont in the temple gang in Jinguan, Henan and Taoqiabao in Yaoxian, Shaanxi.