Do bursts of new genera appear at the same time as bursts of new orders? Multiple Choice Bursts of new genera tend to occur later than the bursts of new orders, except in the Triassic, where the bursts occurred at similar times. Bursts of new genera tend to occur at the same time as bursts of new orders, except in the Cretaceous, where the burst of new genera occurred before the burst of new orders. Bursts of new genera tend to occur at the same time as bursts of new orders, except in the Permian, where the burst of new genera occurred before the burst of new orders. Bursts of new genera tend to occur earlier than the bursts of new orders, except in the Tertiary, where the bursts occurred at similar times