And it wasn't just dinosaurs, nobody ever thinks of
the forams!
The forams behaved exactly as expected of them: the planktonic ones mostly
died out, as did most of the rest of the plankton, and the benthic
(sea-floor) ones took no notice (...only to suffer a major mass extinction
10 million years later, at the Palaeocene-Eocene boundary, when the whole
world became really hot, deep sea included).
The idea was that the small flightless predatory dinosaurs did not what was
expected of them, and I said that apparently they did.