Sanctacaris-like giant Cambrian predator, perhaps 2 meters long. Stem Chelicerata.
Anomalocaris-like predator with 2 flexible grabbing appendages. Anomalocarididae.
A relative of Vetulicolia that has keeled fins along its upper and lower edges. Vetulicolidae.
A trilobite with bull-like cephalic horns. Lichidae.
A Megalograptus-like eurypterid with claws that resemble those of a mantis. Megalograptidae.
A land dwelling, lunged gastropod that feeds on primitive land plants and algal films. Patellogastropoda.
A species of basal tetrapodomorph converging upon pikes in body shape and habits. Stegocephalia.
A species of blind, parasitic trilobite that latches on to fish and sharks, embedding itself like a tick. Phacopida novis.
A small Conodont that acts like a cleaner-wrasse for various fish such as Placoderms. Conodonta.
A pelagic placoderm which hovers vertically in the water to ambush prey from below. Dunkleosteidae.
A giant freshwater placoderm which possesses camouflage to resemble a submerged log. Homostiidae.
A species of Placoderm possessing a body-form resembling a zebra shark. Arthrodira.
A species of mid-sized placoderm with a set of jaws resembling the beak of a terror bird. Dunkleosteidae.
A species of basal tetrapod, that is adapted to walk on the seabed or riverbed, like a handfish. Tetrapodomorpha novis.
An herbivorous petalodont that feeds on encrusting algae, like a blue tang. Belantseidae.
A stout, stubby kind of Hyolith. Hyolitha.
A bottom-feeding relative of Tullimonstrum. Chordata?
A kind of Aistopod amphibian that lives in estuaries and river mouths. Aistopoda.
A relative of Crassigyrinus, that has adapted to be a camouflaged bottom-hugging predator, like a wobbegong. Crassigyrinidae.
A relative of Lepidodendron that has an array of spikes to deter large arthropod herbivores. Lepidodendraceae.
An aquatic amphibian that feeds by biting chunks of flesh off larger amphibians, as with a cookie-cutter shark. Lysorophia.
Komodo-dragon-sized relative of Seymouria. Seymouriidae.
Giant, predatory marine temnospondyl, approximately 10 meters long. Trematosauridae.
Late Permian relictual pelycosaur, with adaptations to conserve body heat in temperate climates. Caseidae.
A small Dicynodont which is mainly carnivorous. Dicynodontia.
A cynodont that has aquatic adaptations akin to a primitive seal. Procynosuchidae.
A relative of Stethacanthus which has a covering of large spiny denticles, for defence. Stethacanthidae.
A relictual Placoderm which has survived into the Permian. Antiarchi.
A small relative of Suminia that has become a treetop glider. Otsheridae.