Machairodus giganteus, saber-toothed cat Tyrannosaurus Rex 296 Index Trilobites of North

296 Index Trilobites of North America are illustrated on this poster

Others are less easy to interpret and may belong to extinct phyla

and Priscacara

form the cliffs

Machairodus giganteus, saber-toothed cat Tyrannosaurus Rex 296 Index Trilobites of NorthMachairodus is a genus of large machairodontine saber toothed cats that lived in Africa, China, Eurasia and North America during the late Miocene 4. 5 to 5 million years ago. It is the animal from which the subfamily Machairodontinae gets its name and has since become a wastebasket taxon over the years as many genera of saber tooth cat have been and are still occasionally lumped into it. In general Machairodus was similar in size to a modern lion or