Diacalymene claviculaFrom the Silurian in Oklahoma
©
1998 Dr. Richard Paselk, Humboldt State University Natural History Museum
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PlatycerasFrom the Silurian in Indiana
©
1998 Dr. Richard Paselk, Humboldt State University Natural History Museum
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Atrypa reticularisFrom the Silurian in California
©
2004 UCMP
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Monograptus priodonFrom the Silurian in California
©
2004 UCMP
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GravicalymeneFrom the Silurian in Kentucky
©
2001 Richard Schrantz
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RusophycusFrom the Silurian in Kentucky
©
2001 Richard Schrantz
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EucalyptocrinitesFrom the Silurian in Kentucky
©
2001 Richard Schrantz
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HalysitesFrom the Silurian in Kentucky
©
2001 Richard Schrantz
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Eucalyptocrinites crassusFrom the Silurian in Indiana
©
2004 Indiana State Museum, Indiana Geological Survey, and Indiana University
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