(January 23, 2014 at 4:25 pm)Pickup_shonuff Wrote:(January 23, 2014 at 3:53 pm)Mister Agenda Wrote: First, you would have to establish that we would expect them to. What new body plans should we have expected to appear that are missing?
Natural selection is conservative, it preserves what works for as long as it works better than the alternatives.
Is there anything that accounts for the abundance of diverse phyla at that time, said to number around 60 (while only 35 different animal phyla exist today), or was natural selection simply less conservative in the pre-Cambrian era?
It is no longer believed that there were so many phyla during that time. All forms from Cambrian appeal to fit within modern Phyla.
