The Moroccan fossils include sponges, worms, trilobites and mollusks like clams, snails and relatives of the living nautilus. Another fossil was similar to today's horseshoe crab, a biological throwback familiar to beachcombers. Now, the scientists said, its antiquity appears to be even greater - some 30 million years earlier than thought, possibly in the late Cambrian.

Wilford, J. N. (2010, June 10). Fossils clear up Cambrian mystery. Manila Bulletin, p. 11.