Sometimes you find a fossil that you never even knew was there when splitting rock. I was trimming down a large piece of matrix, that I'd brought back from the Verulam formation in Canada, and a lucky break allowed this pristine Lingula to see the light of day once more.
Here is a closer view.
This isn't the first Lingula that I've found in rocks from the Verulam formation. Below is another, less complete example.
This specimen was found on the bedding layer of a rock so it was exposed and tossed before reburial. That is not the reason it is incomplete though, that is more so the result of weathering and the very thin, delicate shell that enclosed Lingula.
Both specimens were collected from the Verulam formation near Brechin, Ontario. Based on the book "South-Central Ontario Fossils" by William Hessin, I am calling both specimens Lingula scutum. The Verulam formation is middle Ordovician in age (Katian/Mohawkian stage).