[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: four winged Archaeopteryx

However, reduction from the distal end towards the base DOES
occur through theropod evolution,

I am saying that almost no such reduction happened beyond the state seen in *Archaeopteryx*. Vertebrae shrank and fused, but almost none of them disappeared.

This would argue that in "small-sacralled" birds the long tail was
reduced before incorporation, while in "big-sacralled" birds, the
tail reduction has already occured as the sacrum becomes more

I don't see where the difference between these two conditions is supposed to be. Surely "was reduced before incorporation" means exactly the same as "reduction has already occurred as the sacrum becomes more incorporating"? Your posts are often confusing like this.