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Gyrothyris Mawsoni
''Gyrothyris'' is a genus of brachiopods belonging to the family Terebratellidae. The species of this genus are found in New Zealand. Species: *'' Gyrothyris mawsoni'' *'' Gyrothyris williamsi'' References {{Taxonbar, from=Q3544791 Brachiopod genera ...
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Brachiopods
Brachiopods (), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (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 categories are traditionally recognized, articulate and inarticulate brachiopods. The word "articulate" is used to describe the tooth-and-groove structures of the valve-hinge which is present in the articulate group, and absent from the inarticulate group. This is the leading diagnostic skeletal feature, by which the two main groups can be readily distinguished as fossils. Articulate brachiopods have toothed hinges and simple, vertically-oriented opening and closing muscles. Conversely, inarticulate brachiopods have weak, untoothed hinges and a more complex system of vertical and oblique (diagonal) muscles used to keep the two valves aligned. In many brachiopods, a s ...
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Terebratellidae
Terebratellidae is an extant family of brachiopods with a fossil record dating back to the Jurassic.''Terebratellidae''
in the
Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Pale ...


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Terebratulida
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Gyrothyris Mawsoni
''Gyrothyris'' is a genus of brachiopods belonging to the family Terebratellidae. The species of this genus are found in New Zealand. Species: *'' Gyrothyris mawsoni'' *'' Gyrothyris williamsi'' References {{Taxonbar, from=Q3544791 Brachiopod genera ...
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Gyrothyris Williamsi
''Gyrothyris'' is a genus of brachiopods belonging to the family Terebratellidae. The species of this genus are found in New Zealand. Species: *''Gyrothyris mawsoni ''Gyrothyris'' is a genus of brachiopods belonging to the family Terebratellidae. The species of this genus are found in New Zealand. Species: *'' Gyrothyris mawsoni'' *'' Gyrothyris williamsi'' References {{Taxonbar, from=Q3544791 Br ...'' *'' Gyrothyris williamsi'' References {{Taxonbar, from=Q3544791 Brachiopod genera ...
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