Nicholas J Butterfield
Affiliation: University of Cambridge
- 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...