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| Country | : | Mexico |
| Region | : | Michoacán |
| Outcrop | : | Ciudad Altamirano (Guerrero): Chumbítaro, 13 km N of C. Altamirano |
| References | : | PANTOJA ALOR & SKELTON 1999d |
| Stratigraphy | : | Albian - Cenomanian lower |
| Lithostratigraphy | : | Mal Paso Formation |