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Bottle minerals large Aventurine
A type of hinged shell that is bilateral symmetrical. The two shells are not symmetrical to eachother. One of the shells contained an opening (foramen), a foot / anchor would have stuck out of that opening and leached on to a substrate. This way brachiopods lived attached to the seabed or sometimes even dug into it (e.g. Linguloidae). Brachiopods were filter feeders that can be found in the fossils records, as early as the Cambrian period and even nowadays they exist. Especially during the Palaeozoic period they were thriving.
Example of a brachiopods from the upper Cretaceous in Belgium.
Middle Devonian Atrypid brachiopod from Belgium with shell preservation.
Photos or locations for Brachiopoda on this site
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