Bacteria-like unicellular creature, which is the ultimately unsuccessful result of a completely separate abiogenesis.
Bacterial colony which has convergently evolved a eukaryotic cell configuration. It forms a thick slab-like slick which crawls slowly around like a slime mould, feeding on cyanobacterial mats.
Sponge-like colonial animal which drifts in the oceans below the global ice sheet. It can affect its trajectory slightly as it filters the water actively. Porifera.
Extremely early predator, a Spriggina-like animal that preys on smaller primitive animals. Bilateria.
Siphonophore-like colonial tunicate, which swims actively whilst filtering the water. Tunicata.
Large predatory penis-worm, perhaps 2 feet long. Ottoiidae.
Giant predatory trilobite, 1 meter long. Dorypygidae.
Transitional gnathostome, whose jaws are still only partway developed from gill arches. Stem Gnathostomata.
Partially terrestrial eyrypterid, which greatly resembles a giant spider, 60cm leg span. Stylonuridae novis.
Partially terrestrial placoderm, whose arm-like fore fins act as legs. Bothriolepididae.
Eel-shaped sarcopterygian. Osteolepidida.
Seed-eating early reptile, which actively climbs trees. Captorhinidae.
Primitive aquatic relative of flying insects, which uses its incipient wings to swim underwater. Ephemeroptera.
Aquatic pelycosaur whose adaptations are clear from its osteology. Ophiacodontidae.
Giant, conger-eel shaped anthracosaur anamniote. Embolomeri.
An ape-like arborial relative of Suminia, as heavy as a chimpanzee. Otsheridae.
Gigantic, serpentine relative of Helicoprion, 20 meters long. Edestoidea.