5 Mass Extinctions
2 new Eumaniraptorans (China). Microraptor (Dromaeosaurid) and Anchiornis (Troodontid). Both r among the smallest of all known non-avian theropods. Microraptor from Early Cretaceous, Anchiornis from Jurassic, (160 myo). So, it predates Archaeopteryx by 10my. Both of these little Deinonychosaurs r preserved w/ extremely long feathers on their forearms, feathers are asymmetrical! Microraptor n Anchiornis were clearly not just using their arm feathers for display, they were using them as airfoils.