Bivalve Fossil Positive & Negative Bolivia

This Bivalve fossil is fossilised into a nodule that has been split in two parts: internal mold (positive) and external mold (negative). There is trilobite head remain in same concretion. It hasn't been repaired and is without restoration, showing natural textures and colors, for more details, please see photos.

Species: Nuculites sharpei, Reed 1908

Geological time: Devonian (416 to 359,2 million years ago)

Origin: Patacamaya (Departament of La Paz) Bolivian Altiplano. 

Stratigraphy: Belen Formation.

Measures:
Long: 16 mm 
Wide: 28 mm
Weight: 72 grams

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