The early earth / editor, D.R. Nelson. Earth's formation and first billion years / D.R. Nelson. The early Precambrian stratigraphic record of large extraterrestrial impacts / B.M. Simonson, G.R.
Until recently, details about this group's most distant past have been elusive. But a UC Riverside-led team has now identified the oldest known ecdysozoan in the fossil record and the only one from ...
Davidson, E. H. and Erwin, Douglas H. 2009. "An Integrated View of Precambrian Eumetazoan Evolution." Cold Spring Harbor Symposia on Quantitative Biology, 74 65–80.
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