Extended Data Fig. 6: Derived condition of Cifelliodon and other haramiyidans in root morphology and root implant of upper teeth, in contrast to the primitive condition of mammaliaforms. | Nature

Extended Data Fig. 6: Derived condition of Cifelliodon and other haramiyidans in root morphology and root implant of upper teeth, in contrast to the primitive condition of mammaliaforms.

From: Late-surviving stem mammal links the lowermost Cretaceous of North America and Gondwana

Extended Data Fig. 6

a, C. wahkarmoosuch (UMNH VP16771): procumbent implant of incisor roots. b, The Madagascar mammaliaform Vintana with procumbent incisor roots (based on figure 2 of Krause et al.18). c, Haramiyavia: the first three incisors are procumbent with elongate and procumbent roots (top-labial view, left–right flipped left premaxillary with in situ incisors; bottom-lingual view of left incisors; based on supplementary figure 1 of Luo et al.4). d, Morganucodon oehleri (type specimen, photograph was made by Z.-X.L.): all upper teeth (including incisors) are vertical. e, Haldanodon exspectatus: upper teeth are all vertical, orientation of incisors shown by their vertical alveoli (resegmented from the previously published dataset37). The typical condition for implant of upper teeth is vertical for most mammaliaforms. By comparison the primitive condition of most mammaliaforms, the procumbent incisor implant is a derived condition for haramiyidans, either on all of the incisors (Cifelliodon and Vintana) or on anterior incisors (Haramiyavia).