Paleozoic

Synechodus

Synechodus was a genus of prehistoric saltwater shark which lived from the early Permian Period until the late Eocene Epoch of the Paleogene Period, 290 to 37 million years ago (Ivanov 2005, pages 127-138). Fossils of this animal reached around… Read More ›

Lissodus

Lissodus was a prehistoric shark which lived from the early Triassic to the middle Cretaceous Period, about 250 to 110 million years ago, give or take. Named in 1835, it was a member of a group of sharks called the… Read More ›

Polyacrodus

Polyacrodus was a genus of prehistoric shark, composed of several species, with fossils found in North America, South America, Europe, Asia, and Africa. The name Polyacrodus means “tooth with many bumps”, and it was officially named by the German paleontologist… Read More ›