Figure 4 in A new spalacolestine mammal from the Early Cretaceous Jehol Biota and implications for the morphology, phylogeny, and palaeobiology of Laurasian 'symmetrodontans'

Figure 4. The anterior teeth and alveoli of Lactodens sheni gen. et sp. nov. (holotype, HG-M016). A, optic image; B, scanning electron microscope image. The suffixes -l, -r, -i, and -a in A represent left, right, impression, and alveolus, respectively. Note the orientation of the left canine alveoli (i3-l-a) in which the mesial root is larger and more labially positioned. Abbreviations: C, upper canine; c, lower canine; I, upper incisor; i, lower incisor; P, upper premolar; p, lower premolar. The number indicates tooth locus. The suffixes -a, –l and –r indicate alveolus, left and right tooth.