The Jurassic was the theropod's golden age.
Where Coelos had run in modest packs
Across the Triassic's marginal stage,
His Jurassic descendants made no apology—cracks
In the ecosystem's architecture opened wide
For predators of every size and style,
And Theros' children filled them with the pride
Of the hunting art perfected mile by mile.
Allos was the master of the late Jurassic—
The lion of his age, though larger, heavier,
With a skull built like a hatchet—the classic
And terrible head designed for the gravier
Work of killing sauropods:
The upper jaw a blade, the teeth like steak-knives,
Serrated, curved, the astronomical odds
Of bringing down a forty-ton beast—the lives
Of Allos were spent in the calculated
Art of the ambush and the bleeding wound—
Not the single killing bite but the waited
And strategic slash that made the attuned
And weakening prey bleed out over hours.
His arms were strong—not the reduced
And vestigial stubs of later powers
But functional, grasping, well-produced
Three-fingered hands with claws that hooked
Into the sauropod's flank and held
While the jaws delivered—Allos looked
Like what he was: a killing engine, felled
Together from the blueprint of the theropod
Into its fullest Jurassic expression—
Bipedal, balanced on the fulcrum-rod
Of the tail, the head a terrible confession
Of what the predator's art demands:
Bigger teeth, stronger jaw, the force
Of the bite delivered from the glands
Of muscle anchored in the skull—the course
Of theropod evolution was always toward
A more efficient kill.
But Allos was not alone.
The Jurassic's predator guild was broad
And the niches many—from the bone
Of the largest prey to the smallest lizard,
A theropod was tuned to every scale:
Ceratosauros with his nasal wizard-
Horn and blade-teeth, hunting the same trail
As Allos but at a smaller gauge;
The megalosaurids, heavy-jawed and strong,
Who hunted the European stage
Of the Jurassic world; and all along
The coastal margins, the spinosaurids were
Beginning their experiment with fish—
The long-snouted, sail-backed, the forerunner
Of Spinosauros, who would later wish
The river for his kingdom and receive it.
And in the undergrowth, the small theropods ran:
Compsognathids no bigger than a chicken—believe it—
With delicate jaws for insects, the small-clan
Of Theros' family who proved that the theropod plan
Was not restricted to the giants' game
But worked at every scale—from the span
Of Allos' skull to the smallest frame
Of a running insect-catcher in the ferns.
The arms race between Theros and Sauropos
Drove both to new extremes: at every turn
The predator grew larger, and the colossal
Herbivore grew larger still—the back
And forth of predation and defense
That made the Jurassic an evolutionary track
Of escalation with no end, no fence
To limit the size of the hunter or the prey—
Only the physics of the bone and the capacity
Of the heart to pump the blood on any day
Through a body pushed to its maximum audacity.
This was the theropod's art: to build
The body for a single purpose—killing—
And to refine that purpose until it filled
The predator niche so completely, so thrilling
In its efficiency, that every herbivore
On the Jurassic plain lived in the shadow
Of the theropod's eternal: something more
Terrible is coming from the meadow's
Far edge, with teeth like knives and the patience
Of a hunter who has evolved for nothing else.
Honor Allos and his Jurassic nations
Of the fang—the teeth-and-claws that dwells
In every child's imagination when
They dream of dinosaurs: the great and terrible
Predators who hunted and fed and then
Hunted again—the inheritance indelible
Of the theropod's evolutionary creed:
That the world is meat, and the hunter is born to feed.