侏罗纪燕辽生物群贼兽类牙齿发育双出齿和异时发育的证据

毛方园, 郑晓廷, 王孝理, 王元青, 毕顺东, 孟津

Evidence of diphyodonty and heterochrony for dental development in euharamiyidan mammals from Jurassic Yanliao Biota

MAO Fang-Yuan, ZHENG Xiao-Ting, WANG Xiao-Li, WANG Yuan-Qing, BI Shun-Dong, MENG Jin

Fig. 4 Tooth condition of Xianshou linglong (IVPP V 16707, holotype) A, B. optic image (A) and CL image (B) showing the three cusped second upper incisor (I2) and the single cusped first upper incisor (I1); C. CL image showing the small single cusped I1; D. CL image showing the wear condition of the cheek teeth