paleontology
Great Lakes trilobite fragment

We go to Lake Huron for the long weekend and one part of the beach has lots of trilobites. This year we found this fossil which we can't identify.

Fossil Collector: Keehan

Location: Collingwood, Ontario, Canada

[Editor: Trilobites shed their shells periodically just as modern crustaceans do today. What you have likely found here is a fragment of shell that is missing the head and tail sections of the trilobite. Can any trilobite collectors tell us the specific species?]

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One Response to “Great Lakes Trilobite”

  1. don champagne says:

    These are thoracic segments of the trilobite Pseudogygites latimarginatus (Hall). This is a common find in the dark shales of the Collingwood Formation (Upper Ordovician) in the area.

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