Black Ammonite Fossil we supply a single ammonite similar to the image, measuring 15-20mm with nice ribbing. Asteroceras Obtusi, Early Jurassic,  Huancayo, Peru

Asteroceras is an extinct genus of cephalopod belonging to the Ammonite subclass. These fast-moving nektonic carnivores lived during the Triassic and Jurassic periods (from 205.6 to 189.6 Ma).

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