Twin head-tailed monster

Animal 

Photo by fossilmike

Dicranurus monstrosus or since Dicranurus translates to twin head-tail, the twin-head tailed monster was a lower Devonian trilobite with an unusual array of spines. It looks a bit like the shadow ships from Babylon 5 except with ram horns. It is thought that the spines may have been for defense against early jawed fish such as smaller relatives of the Dunkleosteus. The spines also may have been useful for holding the trilobite out of the mud. They were found between Euramerica and Gondwanaland. Most of the fossils of this species today are found in Morocco. They are very popular with trilobite collectors