Extended Data Fig. 5: Left upper dentition of Sinodelphys szalayi.
From: An Early Cretaceous eutherian and the placental–marsupial dichotomy
a, Dental formula redrawn from a previous study7. b, Dental formula proposed in this work on drawing of CM 79002 (a cast of the holotype). Note that the tooth identified as M1 in the previous study7 is not molariform, but is instead built on the same pattern as the tall, trenchant premolariform tooth that is mesial to it. On the M1 and M2 (as interpreted here), the paracone and metacone are hidden by the stylar shelf.
