Carboniferous trilobites from Tournai (Belgium)
Tournaisian limestone, witch contains remains of the closing Rheic Ocean.
By the the Carboniferous (359 million years ago) the only surviving trilobite Order was Proetida.
The number of taxa again fall dramatically after the Mid-Carboniferous, and at the end of the Permian (251 million years ago) they where extinct.
Carboniferous plant fossils from Mons (Belgium)
Westphalian terril material.
During the Carboniferous (359-299 million years) forest and swamps covered vast extensions of land, land-plants evolved in increasing numbers.
Swamps and forests found cover and food for many enormous scorpions, centripedes, dragonflies, cockroaches and grasshoppers.