ARCHAEOCIDARIS ILLINOISENSIS (2)
Archaeocidaris illinoisensis // Mississippian (lower carbonnifere) // St. Louis Formation, // St. Louis, Missouri.
Archaeocidaris illinoisensis (WORTHEN & MILLER).
et radioles d Archaeocidaris Wortheni
Mississippian (lower carbonnifere )
St. Louis Formation,
St. Louis, Missouri.
lenght:
slab: 15 par 13 cm
3 urchins with spines .... TOP!
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Reference2309



