real life wrote:A new phylum requires MAJOR development (example: totally new body plan), species and genus don't.
Which the time period given allows for. Yes, as a percentage of the entire Earth's history, it's small, but when you count it in years, it's several times longer than the age given to the Earth by James Ussher and more than adequate enough to develop a new phylum.
Quote:For new phyla to show up suddenly in the fossil record without transition is a slap in the face to the evolutionary concept.
No, it's not. See Farmerman's response.
Quote:New species with slight differences between it and the previous species by definition would say that there was an identifiable transition.
Quote:Described recently as "the most important evolutionary event during the entire history of the Metazoa," the Cambrian explosion established virtually all the major animal body forms -- Bauplane or phyla -- that would exist thereafter, including many that were 'weeded out' and became extinct. Compared with the 30 or so extant phyla, some people estimate that the Cambrian explosion may have generated as many as 100. The evolutionary innovation of the Precambrian/Cambrian boundary had clearly been extremely broad: "unprecedented and unsurpassed," as James Valentine of the University of California, Santa Barbara, recently put it (Lewin, 1988).
Lewin then asked the all important question:
"Why, in subsequent periods of great evolutionary activity when countless species, genera, and families arose, have there been no new animal body plans produced, no new phyla?"
Lewin, R. (1988)
Science, vol. 241, 15 July, p. 291
I'm very curious. Where did you get that? Science is notorious for being expensive. The average laymen can't get access to it without shelling out a minimum of $15 per article and certainly, I can't do it without checking that you haven't misquoted him.
Also, what part of, the fossil record is imperfect do you not understand? Evolution still explains everything else, does it not? How have you proved it wrong?
And whether an advanced phylum exists before a less advanced one is besides the point. Firstly, prove it. Secondly, even if one does, so what? Are you saying an advanced phylum can't be wiped out by natural selection pressures? How naive of you.
P.S. I forgot to mention that we have now 18 fossils of pre-Cambrian chordates, which kinda proves your statement wrong. It is telling that you don't really use any recent scientific articles.