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Megapedina charmassei (Cotteau, 1853); Early Oxfordian, Late Jurassic, Druyes, France. From Cotteau 1880-85. Paleontologie Francaise. Terrain Jurassique. Tome X (2). Echinides Regulier. G. Masson, Paris. Plates 436-438. Detail of ambital plating.

Diameter of test not stated.