22432 - Collector Grade 12.01 Inch Halisaurus arambourgi (Mosasaur) Partial Tail Late Cretaceous Caudillaenus the partial left dentary with

the partial left dentary with 3 teeth

Age range: 345

the modern horseshoe crabs look almost identical to prehistoric genera such as the Jurassic Mesolimulus

but somewhat older (from the upper Tremadocian)

22432 - Collector Grade 12.01 Inch Halisaurus arambourgi (Mosasaur) Partial Tail Late Cretaceous Caudillaenus the partial left dentary withMuseum grade specimen. Specimen prepared excellently. It is the tail end of this mosasaur species. The vertebrae are still preserved in a state of anatomical semi articulation (7 vertebrae bones). This specimen has been stabilized on its surface by Paraloid B 72 to ensure its stability and consistency. This process does not affect neither the color nor any of the characteristics. It simply makes the specimen better preserved in the long term. The base