Texigryphaea
http://dbpedia.org/resource/Texigryphaea
Texigryphaea is an extinct genus of oyster belonging to the order Ostreida and family Gryphaeidae. It dates to the Albian to Cenomanian Ages of the Cretaceous period and is primarily found in Texas and the southern Western Interior of North America. However, specimens have been identified from northern Spain. T. tucumcarii is considered to be a synonym for T. pitcheri.
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Texigryphaea
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69005868
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1053504818
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Stenzel, 1959
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~
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Albian to Cenomanian
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Texigryphaea mucronata from the Walnut Formation, Lower Cretaceous of Bell County, Texas
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''About 11 species, see [[#Selected species
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Species
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Texigryphaea
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Texigryphaea is an extinct genus of oyster belonging to the order Ostreida and family Gryphaeidae. It dates to the Albian to Cenomanian Ages of the Cretaceous period and is primarily found in Texas and the southern Western Interior of North America. However, specimens have been identified from northern Spain. The genus were free-living benthic oysters that were often the dominant species in late Albian biomes of the Western Interior Seaway. Some limestone beds of the Muleros Formation near El Paso, Texas, consist almost entirely of fossil fragments of T. washitaensis. Most species preferred soft substrates in quiet environments, but T. navia was adapted to firmer substrates in more energetic environments. The genus differs from Jurassic Gryphaeidae in possessing a vesicular shell structure and chomata (a fine set of parallel ribs found on the inner valves). T. tucumcarii is considered to be a synonym for T. pitcheri.
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4048