Brachiopod conglomerate Panel
Brachiopod conglomerate. Invertebrate of Devonian Ohio.
* Measures: 26 inch (66 cm).
* Museum quality
* Cast in durable polyurethane resins.
* Made in USA
Brachiopods , phylum Brachiopoda, are a group of lophotrochozoan animals that have hard shells on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection. Two major groups are recognized, articulate and inarticulate. The word “articulate” is used to describe the tooth-and-groove features of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic feature by which the two main groups can be readily distinguished. Articulate brachiopods have toothed hinges and simple opening and closing muscles, while inarticulate brachiopods have untoothed hinges and a more complex system of muscles used to keep the two valves aligned. In a typical brachiopod a stalk-like pedicle projects from an opening in one of the valves near the hinges, known as the pedicle valve, keeping the animal anchored to the seabed but clear of silt that would obstruct the opening.
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