Theriimorpha

Fruitafossor is a termite-eating mammal endemic to North America during the Late Jurassic epoch (around 150 mya).

Theriiformes is a clade of mammals. The term was coined by Timothy B. Rowe in his doctoral dissertation, and is defined as the clade formed by the most recent common ancestor of multituberculates (which form part of the broader group Allotheria, along with Gondwanatheria and likely all or part of Haramiyida) and Theria (the group containing marsupials and placental mammals). Mammals more closely related to therians than to multituberculates are included in the clade Trechnotheria.

Theriimorpha is a clade of mammals defined as including all mammals more closely related to therians (including placental mammals and marsupials) than to monotremes. Eutriconodonta is usually considered among the most basal members of this group, with other members more closely related to therians like Allotherians placed in the subclade Theriiformes, though Eutriconodonta has also been recovered as less closely related to therians than monotremes are in some analyses, placing them outside the crown group of Mammalia. The unusual Late Jurassic digging mammal Fruitafossor has also been suggeste