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Description: | The shells (valves) of Productus are quite different in size and shape. The larger convex (outward curving) shell rested on the sea floor and a smaller flat shell acted like a lid. Productus was an unusual brachiopod because it did not have a pedicle (fleshy stalk) to keep it fixed to the sea floor. Instead it used stubby spines on the outside of the concave shell to keep it in position. The broken ends of these spines can be seen clearly on one specimen | License: | http://www.imagine.org.uk/about/copyright/ | Rights holder: | Tyne & Wear Museums | Subjects: | fossils natural world | Source: | Tyne and Wear Imagine | Identifier: | http://www.imagine.org.uk/details/index.... | Go to resource |
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