Genetic studies have shown that Siamotyrannus was in fact more closely related to humans.

I thought Siamotyrannus was an ancestor of the bat

Don't be silly. The ancestor of the bat is obviously Batman.

No, Batman evolved into siamotyrannus which evolved into bats which evolved into elephants

Batman is actually the LUCA: the last universal common ancestor.

I'm getting temptations to paste a picture of Batman's head onto a lungfish

neither of these are mammals

Boy i sure love siamotyrannus it's my favorite cenozoic mammal

*cenzoic