
The larvae of one of the Australia's lungfish species. Photo credit: Nicholas J Cole
Australia’s living fossil has given scientists an insight into the development of our hind legs.
Ancient lungfish are the ancestors of the tetrapods, the four-legged creatures that took the first steps on land 400 million years ago. These fish could breathe air and propel themselves along the ground with their fins, allowing them to survive on land.
Australia is home to two marine species of lungfish and a third that inhabits Queensland’s Mary River Basin. A team of scientists led by Professor Peter Currie, from the University of Sydney, used these living fossils to trace the evolution of terrestrial hind legs.
“Lung fish are the closest living fish species to tetrapods,” said Professor Currie, one of the authors of the study published in the online journal
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Mark
October 21, 2011
Wow that’s awesome, how come we aren’t seeing land sharks sliding out of the ocean in the last couple of thousand years?
Larry Zetlin
April 1, 2012
Unless the text books are terribly wrong there are no living marine lungfish in Australian waters. The one and only freshwater lungfish is Neoceratodus forsteri, originally found only in a limited number of east flowing rivers in Queensland but subsequently introduced into other east flowing rivers, such as the Brisbane River.