Belemnite

Belemnites (or belemnoids) are an extinct group of marine cephalopod, similar to the modern squid.

Orthoceras

Orthoceras is a genus of extinct nautiloid cephalopod

Anglaspis

Anglaspis is one of the most primitive of the heterostracans , and is almost completely covered by large bony plates and large bony scales. It is from the Lower Devonian Period.

Gemuendina

Gemuendina was an early placoderm species from the seas of Early Devonian Germany.

Hemicyclaspis

Hemicyclaspis is an extinct genus of primitive jawless fish, that lived in the Devonian period in what is now Europe and North America.

Arandapsis

Arandapsis is one of the earliest known vertibrates.

It was a fish that had no fins and a jawless mouth.

Found in 1959 in Australia in 500 Million Year Old marine sandstone.

Pteraspis

Pteraspis was a genus of jawless fishlike vertebrate found as fossils in Early Devonian rocks ( 387 to 408 million years old) in North America and Europe.

Drepanaspis

Drepanaspis is

an extinct species of primitive jawless fish from the Early Devonian

Bothriolepis

Bothriolepis was a genus of antiarch placoderms that

lived in the Middle and Late Devonian (387–360 million years ago).

Coccosteus

Armored Fish, Placoderm, Coccosteus cuspidata
from the Middle Devonian

Ichthyostega

Ichthyostega is an early tetrapod that lived in the Upper Devonian period, 367-362.5 million years ago.

36" long

Acanthostega

Acanthostega appeared in the Upper Devonian (Famennian) about 365 million years ago, and was anatomically intermediate between lobe finned fishes and the first tetrapods.

24" long

Eusthenopteron

Eusthenopteron is known from several species that lived during the Late Devonian period, about 385 million years ago. Eusthenopteron was first described by J. F. Whiteaves in 1881.

26" long

Dunkleosteus

late Devonian period, about 360 – 415 Million Years Ago

this is a juvenile and is 32" long

Eurypterid

Cambrian to Permian from 510 to 248 million years ago.

11" long

The Tully Monster

The Tully Monster

(Tullimonstrum gregarium)

300 Million Years Old

First fossils found by Francis Tully at a site in

Grundy County, Illinois in 1958.

In 1989 it was officially designated the State Fossil of Illinois.

11 1/2" long