570 vanished lives

15Paleozoic

Sharpened jaw plates replaced teeth in this heavily armored apex fish.

35Paleozoic

Its spiral tooth whorl worked like a permanent slicing blade inside the lower jaw.

36Paleozoic

Opposing tooth blades projected from its jaws like curved shears.

37Paleozoic

Bones inside its fleshy fins foreshadowed the limb pattern of land vertebrates.

82Paleozoic

A flat-headed fish with a mobile neck and wrist-like fin bones approached the anatomy of early tetrapods.

102Paleozoic

Bony armor enclosed its head and chest while jointed pectoral appendages steadied it on the bottom.

167Paleozoic

An armored jawless fish with a broad head shield and an elongated tail; fossil distortion leaves parts of the tail outline uncertain.

168Paleozoic

This giant lobe-finned predator used fanglike teeth to ambush prey, while its fin skeleton followed a tetrapod-like pattern.

208Paleozoic

It lacked jaws and paired fins, but its head and gill region were enclosed within strong armor.

209Paleozoic

Sensory fields beneath a broad crescent-shaped head shield helped it search through turbid bottom water.

211Paleozoic

A flat head with upward-facing eyes and limb-like bones inside its fins brought it close to the earliest tetrapods.

257Paleozoic

Rows of paired ventral spines formed a defensive fence beneath this small early jawed fish.

258Paleozoic

Its body was a flattened shield with upward-facing eyes and a mouth beneath the front edge.

259Paleozoic

An eel-like body, continuous fin and spine behind the head made it unlike any modern shark.

260Paleozoic

A single head spine, forked teeth and continuous dorsal fin defined this freshwater shark.

320Paleozoic

An embryo with an umbilical connection records some of the earliest live birth.

321Paleozoic

This giant placoderm lacked sharp jaw blades and may have filtered plankton.

437Paleozoic

Placoderm armor enclosed jaw-margin bones resembling those of later bony fish.

438Paleozoic

Huge conical teeth armed a multi-meter freshwater lobe-finned predator.

441Paleozoic

Males carried a denticle-covered anvil-shaped structure on the back.

488Paleozoic

A broad flat placoderm independently converged on the body shape of a ray.

489Paleozoic

Crescent-shaped lateral horns widened the head armor of a small bottom-dwelling placoderm.

519Paleozoic

Males carried a striking anvil-shaped brush-and-spine complex on the back.

520Paleozoic

A short snout, large eyes and pectoral structures belonged to an early chimaera relative.