Phil, I just came across this family tree and it's absolutely brilliant. (Can't decide whether I like this one or the creationist one better
)
A few finer points of phylogeny for you, in case you're interested in further modifying this baby:
- Your ceratites seem to spring from within the goniatites, whereas we know pretty clearly that they sprang from within the prolecanites (yeah, I know no one ever uses that word, but I like it).
- Due to a couple of recent discoveries, it's now thought by some that ammonites may have just barely survived the K/Pg boundary. Oh, right, the word "Tertiary" is no longer officially sanctioned either.
- I thought that cuttlefish extended back at least into the Cretaceous. ?
- As I recall the evidence is pretty clear that argonaut shells go back to the Jurassic.
- I see you now have Pohlsepia in the Pennsylvanian. Presumably we are calling it a cirrate octopod, in which case the first non-cirrate form occurs in the Jurassic if you want to mark that separately. It is not an argonaut but is known rather from soft-body impressions from a quarry in France.
Again, my congratulations on a job well done.
- peftypefty