I want to know the answer to the following question:
Which group do marsupials and placentals belong to?
All the background I'm provided with is that "Since this ancestor lived in the Jurassic period, Rowe's definition excludes all animals from the earlier Triassic, despite the fact that Triassic fossils in the Haramiyida have been referred to the Mammalia since the mid-19th century.". Is that enough to answer the question?
Answer: no