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They use homologous structures as base of classification
The answer is the Dinosaurs and the Pterosaurs.
The Jurassic Period follows Triassic Period. It is known as the Age of Reptiles. the land was dominated by the dinosaurs and the flying pterosaurs. Both groups are reptiles. Other animals and plants during this period have just recovered from the largest mass extinctions on Earth.
The focus is the point within the earth where seismic waves originate; it is centered on the part of the fault that has the greatest movement. The epicenter is on the earth's surface directly above the focus.
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