Leonaspis Trilobite fossil Specimen 3 Stationery the Isurus praecurser (Macrorhizodus praecursor)

the Isurus praecurser (Macrorhizodus praecursor) genus branches from the makos

Petroleum Quartz is an intriguing specimen

it’ll stand its ground and fight

also known as the greater cane rat or “grasscutter

comes from the German word "quartz" meaning "hard" and the Ancient Greek word "kruos" meaning "icy cold"

Leonaspis Trilobite fossil Specimen 3 Stationery the Isurus praecurser (Macrorhizodus praecursor)2. 5x2" The Leonaspis trilobite has spines for days, and thats one of the many reasons we love carrying them. The way this specimen has been preserved makes it look like it is slowly sifting through silt on the ocean floor, and thats probably not far off from what it actually did during its life. Its a snapshot from the Late Devonian to Carboniferous periods (roughly 360300 million years ago), when these spiky buddies thrived. Speaking of the spines,