April 18th, 2014

ANCIENT SHARK FOSSIL REVEALS NEW INSIGHTS INTO JAW EVOLUTION

ANCIENT SHARK FOSSIL REVEALS NEW INSIGHTS INTO JAW EVOLUTION

Press Release American Museum of Natural History 16. April 2014 —————- Skull structures of 325-million-year-old shark fossil show that living sharks are evolutionarily advanced The skull of a newly discovered 325-million-year-old shark-like species suggests that early cartilaginous and bony fishes have more to tell us about the early evolution of jawed vertebrates—including humans—than do modern

A Palaeozoic shark with osteichthyan-like branchial arches

A Palaeozoic shark with osteichthyan-like branchial arches

Published online on 16. April 2014 A Palaeozoic shark with osteichthyan-like branchial arches Alan Pradel, John G. Maisey, Paul Tafforeau, Royal H. Mapes, Jon Mallatt ABSTRACT: The evolution of serially arranged, jointed endoskeletal supports internal to the gills—the visceral branchial arches—represents one of the key events in early jawed vertebrate (gnathostome) history, because it provided