Concerning Iberomesornis and
Sinornis (both enantiornithines with reduced mt IV), have all the
people interested read the latest Sereno paper (which corrects Sereno &
Rao 1992: Sinornis has no gastralia, so no known bird
Arghh! It's hard to keep up with all the
facts sometimes. No, I haven't read the new Sereno paper (our library
stopped getting Neus Jahrbuch in 1993). Apologies to everyone for
stating that Iberomesornis and Sinornis had unreduced fourth
metatarsals. What did the gastralia of Sinornis turn out to be,
What age is the Kimmeridge Clay?
Indeed it is.