Evolution Of Dinosaurs
Dinosaurs evolved from the archosaurs 232-234 Ma (million years ago) in the Ladinian age, the latter part of the middle Triassic. Dinosauria is a well-supported clade, present in 98% of bootstraps. It is diagnosed by many features including loss of the postfrontal on the skull and an elongate deltopectoral crest on the humerus.
Other articles related to "evolution of dinosaurs, dinosaurs":
... period, caused the extinction of all dinosaurs except for the line that had already given rise to the first birds ...
Famous quotes containing the words evolution of and/or evolution:
“The evolution of a highly destined society must be moral; it must run in the grooves of the celestial wheels.”
—Ralph Waldo Emerson (18031882)
“The more specific idea of evolution now reached isa change from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity, accompanying the dissipation of motion and integration of matter.”
—Herbert Spencer (18201903)