Pteronisculus is an extinct genus of prehistoric ray-finned fish that lived during the Early Triassic and Middle Triassic epochs of the Triassic period worldwide.
The Early Triassic is the first of three epochs of the Triassic Period of the geologic timescale. It spans the time between 251.902 Ma and 246.7 Ma. Rocks from this epoch are collectively known as the
Sandstone from the Lower Triassic Series
The Putorana Plateau is composed of basalt rocks of the Siberian Traps.
Early Triassic brittle stars (echinoderms)
Fossils of the bivalve Claraia clarai