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Fossil collection records
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Classification of Wagner 1972
Subor. †
Phymosomatoida
Mortensen 1904
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Fm. †
Phymosomatidae
Pomel 1883
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G. †
Porosoma
Cotteau 1856
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†
Porosoma cribrum
Agassiz 1840
†
Porosoma fifei
Wagner 1972