Oldhamia is an ichnogenus describing burrows produced by worm-like organisms mining underneath microbial mats. It was common from the Early Cambrian deep-water deposits. The Ediacaran species Oldhamia recta are body fossils of a rod-like organism, rather than ichnofossils. The Ordovician Oldhamia pinnata and Carboniferous-Permian Oldhamia fimbriat...