Respuesta :

Answer:

I'm assuming you mean the rock layers below the tyrannosaurid. If so the animal on the first layer below the tyrannosaurid is an itchthyosaur, ( a dolphin like reptile) of some sort. Below the itchthyosaur are trilobites. Trilobites are related to the modern day horse shoe crab.

Explanation:

Answer:

Trilobite and armored fish existed before the dinosaur

Explanation:

As seen in the rock layers, the layers at the bottom represents the species that existed first on the time scale as compared to the species lying in the layers above it.  

Hence, trilobite and armored fish existed before the dinosaur because they lie at lower layer of soil deposits.  

Geological age “premian” existed before the dinosaur age and during that time the prominent form of life was trilobite.

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