Helminthochiton from the Pennsylvanian of Oklahoma

E. A. Frederickson

1962

Article

Oklahoma Geology Notes 22(11):298-302

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Taxa discussed in this work:

• Echinocrinus
• Helminthochiton riddlei

Taxonomy:

• Helminthochiton riddlei belongs to Helminthochiton - Frederickson (1962)
• Echinocrinus belongs to Echinoidea - Frederickson (1962)