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Article

Molecules, morphology, and ecology indicate a recent, amphibious ancestry for echidnas.

Proceedings of the National Academy of Sciences of the United States of America - 6 Oct 2009

Phillips Matthew J, Bennett Thomas H, Lee Michael S Y

Abstract excerpt

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,...

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Identifiers

PMID: 19805098
DOI: 10.1073/pnas.0904649106
PMCID: PMC2761324

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