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brachiopod |
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brachiopodAny member of the phylum Brachiopoda, marine invertebrates with two shells, resembling but totally unrelated to bivalves. There are about 300 living species; they were much more numerous in past geological ages. They are suspension feeders, ingesting minute food particles from water. A single internal organ, the lophophore, handles feeding, aspiration, and excretion. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Since then, volume after volume has appeared, dealing with trace fossils, spores, conodonts, sponges, plants, graptolites, foraminifers, brachiopods and, yes, more trilobites (according to some, too many, but never mind). Other prominent losers were the brachiopods, two-shelled animals that superficially resembled clams. Bambach figured that passive animals that merely sat on the seafloor--like brachiopods, then the most abundant animals--would die. |
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