Primitive fish could nod but not shake its head

Primitive fish could nod but not shake its head

Ancient fossils reveal surprises about early vertebrate necks, abdominal muscles

By Erin Wayman, 14:30 PM June 13, 2013

Ancient fish fossils with preserved muscle tissue offer a glimpse at how necks evolved in early vertebrate animals. The fossils also offer a puzzle: The fish had specialized abdominal muscles found today in land animals, but not in fish, paleontologists report June 13 in Science.

The 380-million-year-old fossils come from Western Australia’s Gogo Formation and contain three-dimensional details of neck, body and tail muscles. The specimens represent several genera of predatory fish armored i...

Source URL: https://www.sciencenews.org/article/primitive-fish-could-nod-not-shake-its-head?mode=magazine&context=4556