The spread of flowering plants (angiosperms) and "advanced" ornithischians, another major group of herbivorous dinosaurs (noted for their highly developed chewing mechanisms), are most likely not a major factor in sauropod decline in the northern continents.
Širenje biljaka cvjetnjača i "naprednih" pripadnika Ornithischia, još jedne velike grupe dinosaura biljoždera (poznatih po vrlo razvijenim mehanizmima za žvakanje), vjerojatno nisu glavni faktor u smanjenju broja sauropoda na sjevernim kontinentima.