Fossilized last meal reflects spiral-shaped intestine
Wednesday, January 6, 2016 - 10:25
in Paleontology & Archaeology
The fossilized food remains of the extinct predatory fish Saurichthys reflect its spiral-shaped intestine. The spiral valve in fossils from Southern Switzerland is similar to that of sharks and rays. Paleontologists have thus closed a gap in the knowledge concerning the evolution of the gastrointestinal tract in vertebrates.