Trilobite
author: Walter B. Myers/Novapix
reference: t-glb99-00040
Image Size 300 DPI: 33 * 25 cm
An Olenoides serratus trilobite scurries across a Middle Cambrian ocean floor about 500 million years ago. Olenoides serratus grew to be about four inches long. This trilobite shares the scene with two kinds of diminutive sponge: the smaller branching sponges are from the genus Vauxia, while the larger corrugated tubular sponges are from the genus Wapkia.