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.

[1][2] The Ediacaran species Oldhamia recta are body fossils of a rod-like organism, rather than ichnofossils.

It was named after the geologist Thomas Oldham by Edward Forbes, who first described it in 1848.

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