Nicholas J ButterfieldSummaryAffiliation: University of Cambridge Country: UK Publications
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Publications
Hooking some stem-group "worms": fossil lophotrochozoans in the Burgess ShaleNicholas J Butterfield
Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ
Bioessays 28:1161-6. 2006..Despite their close relationship, these two jawed, segmented worms could conceivably represent the early stages of two separate phyla...
Reconstructing early sponge relationships by using the Burgess Shale fossil Eiffelia globosa, WalcottJoseph P Botting
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, United Kingdom
Proc Natl Acad Sci U S A 102:1554-9. 2005..These results support molecular analyses that identify the calcarean-silicisponge transition as the earliest major sponge branch and suggest that the heteractinids were paraphyletic with respect to the Hexactinellida...
Sophisticated particle-feeding in a large Early Cambrian crustaceanThomas H P Harvey
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, UK
Nature 452:868-71. 2008..This Early Cambrian record predates the major expansions of large-bodied, particle-handling crustaceans by at least one hundred million years, emphasizing the importance of ecological context in driving adaptive radiations...
Origin of the Eumetazoa: testing ecological predictions of molecular clocks against the Proterozoic fossil recordKevin J Peterson
Department of Biological Sciences, Dartmouth College, Hanover, NH 03755, USA
Proc Natl Acad Sci U S A 102:9547-52. 2005..Thus, the more readily preserved microfossil record provides positive evidence for the absence of pre-Ediacaran eumetazoans and strongly supports the veracity, and therefore more general application, of the ME molecular clock...
