[Alamo-Girl]

That's not exactly "no new body plans" unless you think we all look like fish.

LOLOLOL! Actually, the term "body plans" is just common speak for "phyla". There have been virtually no new phyla since the Cambrian explosion.

Thank you for your reply!

[Lurking Libertarian]

LOLOLOL! Actually, the term "body plans" is just common speak for "phyla". There have been virtually no new phyla since the Cambrian explosion.

I'm aware of that, but my point is that, since the definition of "phylum" is so broad, the fact that there have been no new ones since the Cambrian isn't as weird as it sounds.