Thysanopeltis speciosa austromaura, Devonian trilobite fossil. Trilobites were arthropods that fed as they crawled on the seabed. They lived between 500 and 300 million years ago and are now extinct. This specimen dates from the Middle Devonian, and was found in Eifelian stage rocks in Chabel el Dheb, Morocco. It is a complete individual, with its glabella widening out considerably to the front with large frontal lobes. The eyes are set far back. The pleurae extend into curved spines. The pygidium is large and vaulted with ribs, terminating in a ring of tiny sharp spines. This specimen is 2.8 centimetres long.