Evidence from 18S ribosomal DNA that the lophophorates are protostome animals
作者： K. Halanych , J. Bacheller , A. Aguinaldo , S. Liva , D. Hillis
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摘要: The suspension-feeding metazoan subkingdom Lophophorata exhibits characteristics of both deuterostomes and protostomes. Because the morphology embryology lophophorates are phylogenetically ambiguous, their origin is a major unsolved problem phylogenetics. complete 18S ribosomal DNA sequences all three lophophorate phyla were obtained analyzed to clarify phylogenetic relationships this subkingdom. Sequence analyses show that protostomes closely related mollusks annelids. This conclusion deviates from commonly held view deuterostome affinity.
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