Dicranurus monstrosus, Trilobite (Replica) Dimetrodon 9 metric tons)

9 metric tons)

2---cave bear skull (ask)

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the calyx (or head) which contains the mouth parts and internal organs

Chasmosaur vertebra

Dicranurus monstrosus, Trilobite (Replica) Dimetrodon 9 metric tons)Here is one of the more sought after trilobites of the Order Lichida, Family Odontopleuridae known as Dicranurus monstrosus. This specimen was found in the Devonian Megrane Formation near Oulmes, Morocco. Among its impressive features are the dramatically retorted occipital spines, looking like ram's horns. To what purpose could this spiny exoskeleton have been evolved? The answer is simple DEFENSE!! Fish had recently evolved jaws, and in the never