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. 5 Tooth condition of Shenshou lui (LDNHMF 2001, holotype) A. CL image showing the two cusped upper incisors, absence of tooth germ, and wear condition of cheek teeth; B, C. optic images showing wear facets of the upper incisors (B) and the left lower cheek teeth (C)