I've asked for help on identifying this novel about a year ago but nothing. So here goes again.
Ancient intelligent lizard species running out of food to the extent they are eating their own eggs. They invent time travel to the present and commence changing the present environment for their own purposes. They are so superior to humans they appear as ancient "lords" or "princes" and they have vast powers. I read this in the early 90's but it may have even then been up to a decade old.
If I recall correctly, the terraforming is along the lines of the strange growths and the reptiles are long the same lines as well - in Dean Koontz' "The Taking". The revelation about the provenance of the lizards comes quite late in the novel. Aldiss' "The Saliva Tree" is also similar but there was less skill in the book I'm after as I recall than Aldiss, who of course was simply a master. It was nonetheless an excellent read if my aging synapses recount accurately.
