Mesozoic
Triassic
A therocephalian which has convergently evolved live birth, of well developed young. Ericiolacertidae.
A relative of Cartorhychus, which has re-adapted to a primarily terrestrial existence. Stem Ichthyosauria.
A fair-sized primitive ichthyosaur, which can haul out on land like a sea lion. Stem Ichthyosauria.
An ancestral placodont which is terrestrial, having not yet developed aquatic habits. Placodontia.
A tree-dwelling ornithodiran with perching feet and gripping hands. Lagerpetidae.
A small, wide-bodied aetosaur. Stagonolepididae.
An oversized relative of Vanclavaea, perhaps 3.5 meters long. Archosauriformes.
A relative of Azendohsaurus which reaches a large size of about 4.5 meters, and can stand and walk on its hind legs. Vaguely resembling a prosauropod. Allokotosauria.
Jurassic
A carnivorous heterodontosaur. Heterodontosauridae.
A Rhomaleosaur that combines large, pliosaur-like fangs with a relatively long neck. Rhomaleosauridae.
A partially quadrupedal relative of tetanurans. Stem Tetanurae.
A relative of Scelidosaurus which has blade-like tail armour similar to Gastonia. Scelidosauridae.
A giant orb-weaving spider that is able to catch small pterosaurs and juvenile dinosaurs. Nephilinae.
A carnivorous relative of Limusaurus, that is adapted to catch small vertebrates and insects. Elaphrosaurinae.
A Shunosaurus-like dinosaur, that has a large thagomizer instead of a tail club. Sauropoda.
A flightless, island-dwelling Dimorphodontid with only vestigial wings. Dimorphodontia.
A coelurid maniraptoran which is able to run in cheetah-like bursts of high speed, to catch its prey. Coeluridae.
An Apatosaurus-like dinosaur which has large, ossified spikes and armour on its neck. Apatosaurinae.