mammal
The dentary bone with two rows of cusps on molars and double-rooted teeth is the oldest of its type in the world and belonged to a new early-diverging haramiyid species from the late Triassic period named Kalaallitkigun jenkinsi
Andrzej Wolniewicz/Marta Szubert
Dinosaur hunters find 215-million-year-old ‘double root’ tooth and new species of Triassic creature resembling a large mouse
