On some vertebrata from the Permian of Illinois

E. D. Cope

1883

Article

Proceedings of the Academy of Natural Sciences of Philadelphia 35:108-110

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Taxa discussed in this work:

• Ctenodus heterolophus
• Ctenodus vabasensis
• Didymodus
• Thoracodus
• Thoracodus emydinus

Taxonomy:

• Thoracodus emydinus belongs to Thoracodus - Cope (1883)
• Ctenodus heterolophus belongs to Dipterus (Ctenodus) - Cope (1883)
• Ctenodus vabasensis belongs to Dipterus (Ctenodus) - Cope (1883)