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. 7 Tooth condition of Shenshou lui (JZT-CK005, paratype 2) A, B. optic (A) and CL (B) images showing the three cusped upper incisor and no teeth germ under any tooth locus; C, D. optic (C) and CL (D) images showing the deep wear facet of the cheek teeth