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机译:Hooking some stem-group "worms": fossil iophotrochozoans in the Burgess Shale
Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England;
WIWAXIA-CORRUGATA MATTHEW; CAMBRIAN EXPLOSION; ANIMAL PHYLOGENY; POLYCHAETE; RADULA; GASTROPODA; MOLLUSK; POLYPLACOPHORA; ULTRASTRUCTURE; PRESERVATION;