Sanctacaris-like giant Cambrian predator, perhaps 2 meters long. Stem Chelicerata.
Anomalocaris-like predator with 2 flexible grabbing appendages. Anomalocarididae.
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 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 bottom-feeding relative of Tullimonstrum. Chordata?
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 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.