Cretaceous Animals, Dinosaurs & Extinction

434Mesozoic

A coiled shell nearly two meters wide belonged to the largest known ammonite.

442Mesozoic

A giant bony fish filtered plankton near the ocean surface.

447Mesozoic

A short square snout, leaf-shaped teeth and armor belonged to a likely plant-eating crocodyliform.

453Mesozoic

A deep snout with facial ridges marked an early northern tyrannosaurid.

454Mesozoic

A relatively complete skeleton makes this giant titanosaur unusually measurable.

455Mesozoic

Paired neck spines curved forward and may have carried keratin or soft tissue.

458Mesozoic

It hunted through polar night, though its supposedly dwarf size remains uncertain.

495Mesozoic

A long snout, conical teeth and low crest belonged to a spinosaurid that frequently ate fish.

535Mesozoic

Long three-fingered arms and a light body preceded the giant two-fingered tyrannosaurs.

536Mesozoic

This giant carcharodontosaurid shared plains with enormous sauropods and is known from a multi-individual bone bed.

537Mesozoic

Heavy skull armor, neck rings and a tail club belonged to a large Gobi ankylosaur.

538Mesozoic

Short legs, a broad trunk and giant thumb spike made an unusually low heavy iguanodontian.

553Mesozoic

Tough pinnate leaves crowned cycad-like trunks around compact flower-like reproductive organs.

564Mesozoic

Long hind limbs and a lightly built skeleton indicate a large, fast-moving theropod.