Pelecanimimus

MEANING: Pelican mimic

PERIOD: Early Cretaceous

CONTINENT: Europe

Pelecanimimus is a small ornithomimosaur, at about 2.5 m long and weighing 17-30 kg. It had 220 teeth in its long narrow skull, the most of any known theropod. This is especially unusual as almost all other ornithomimosaurs had no teeth at all. It also sported a pouch similar to the larger pouches of modern pelicans, from which Pelecanimimus took its name.

Pelecanimimus is from the Early Cretaceous. The Cretaceous is the third and final geological period of the Mesozoic Era, with the Early Cretaceous making up roughly the first half, lasting from about 143 to 100 million years ago. The poles were ice-free, due to the relatively warm climate, and forests extended into high latitudes. The continued breakup of the continents created new coastlines and isolated landmasses, influencing the evolution of distinct dinosaur faunas.

It was a time of transition, as many groups of animals and plants began to take on more modern forms while others declined or disappeared. Pterosaurs continued to thrive, though early birds were becoming more diverse and widespread. Mammals remained small but adapted to a variety of ecological niches. In the oceans, ichthyosaurs and plesiosaurs were common, and early mosasaurs began to appear.

Dinosaurs remained the dominant land animals, with groups like iguanodontians, spinosaurids, and carcharodontosaurids rising to prominence. While sauropods declined in some regions, they remained abundant in the Southern Hemisphere. The first true ceratopsians appeared, and ankylosaurs replaced stegosaurs in their niche. Dromaeosaurs and other small theropods diversified. During this time, the first flowering plants evolved, gradually changing global ecosystems by providing new food sources for herbivores.

Pelecanimimus is an ornithomimosaur. Ornithomimosauria was a unique group of theropod dinosaurs whose name means "bird mimics," as their general body plan resembles modern ostriches. Part of the larger group Coelurosauria, they were characterized by their small heads, long necks, lightly built bodies, and long, powerful legs built for fast running. Most ornithomimosaurs had toothless beaks, and some evidence suggests they may have been omnivorous or herbivorous rather than strict predators like many other theropods. As they evolved, the derived ornithomimids became some of the most specialized runners of the Mesozoic Era.

Ornithomimosaur fossils have been discovered in North America, Asia, and possibly other regions, showing that they had a wide distribution by the Late Cretaceous. Their success in multiple environments suggests they were highly adaptable, capable of thriving in a variety of ecosystems ranging from floodplains to deserts. Though ornithomimosaurs were not top predators, their speed and agility likely helped them evade the larger carnivores of their time.