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Transitional Forms and the Evolution of Phyla
Morton, GR. 2001.  PSCF 53(1):42-51. CELD ID 15061

Abstract
The claim is often made in Christian circles that there is no evidence for phylum level evolution. Evidence, in the form of morphological similarities, is presented showing that transitional forms connecting phyla do exist. Specific morphological connections are examined which unite the lobopods, arthropods, brachiopods, molluscs, and annelids. By examining these lineages, evidence arises indicating that the Cambrian Explosion was not very explosive. In contradiction to many apologetical claims, it occupied a period of nearly 100 million years. This paper discusses the causes of the rapid differentiation and apparent abundance of Cambrian animals, adding to the evidence that the Cambrian does not represent the creation event. For some Christians to equate the Cambrian Explosion with the creation event ignores the massive evidence of animals appearing gradually beginning in the Precambrian and continuing into the Cambrian. The creation of life on earth must be much earlier than the early Cambrian.