Coevolution of angiosperms and bees

[Andersons <banderson@xxxxxxxxxxxx>]

Dear Members,

I am currently writing a student research paper on the "Coevolution of 
angiosperms and pollinators".  In the course of doing my research I have 
come across mention of work done by Stephen Hasoitis and the discovery 
of ancient bee nests found in the "Morrison Formation" in northeastern 
Arizona and have been in touch with him.  Is there anyone else out there 
who can shed additional light on the question "which came first - 
angiosperms or bees?  I have many other questions and would like to 
enter into dialog with knowlegable individuals on this topic.

I have long been an amateur naturalist interested in botany and bees.  I 
am writing this paper in partial fulfillment of requirements for a 
course in "Evolution and Earth History", which I am taking to 
satisfy New York state teacher certification criteria.