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The Carboniferous ammonoids of America (Plate XXIX) BHL13768463
Glaphyrites excelsus syn. Gastrioceras excelsumThe Carboniferous ammonoids of America / by James Perrin Smith.
The Carboniferous ammonoids of America (Plate XXVIII) BHL13768459
Glaphyrites excelsus syn. Gastrioceras excelsumThe Carboniferous ammonoids of America / by James Perrin Smith.