David M. Rudkin, Assistant Curator - Palaeobiology Department of Natural History points to a singleÊindividual - located in the centre - of Asaphellus stubbsi, which is the unique holotype specimen for this recently described species. A large slab of trilobites from the Draa Valley area of Morocco is of Early Ordovician age (~480 million-years-old). This is a "death assemblage" recording the mass mortality ofÊthree different species of trilobites, probably as a result of storm turbulence on the ancient sea floor.

Fred Lum/The Globe and Mail