Molecules, morphology, and ecology indicate a recent, amphibious ancestry for echidnas
The semiaquatic platypus and terrestrial echidnas (spiny anteaters) are the only living egg-laying mammals (monotremes). The fossil record has provided few clues as to their origins and the evolution of their ecological specializations; however, recent reassignment of the Early Cretaceous Teinolophos and Steropodon to the platypus lineage implies that platypuses and echidnas diverged >112.5 million years ago, reinforcing the notion of monotremes as living fossils. This placement is based...[Show more]
|Collections||ANU Research Publications|
|Source:||PNAS - Proceedings of the National Academy of Sciences of the United States of America|
|01_Phillips_Molecules,_morphology,_and_2009.pdf||824.91 kB||Adobe PDF||Request a copy|
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.