Began as a short story in Death Rattle (Kitchen Sink Press, 1985 series) #8 (December 1986).
There was a second print of #1-3, all January 1989; with second print of #6 also thought to exist. There has been a brief second series, as: Xenozoic Tales (Dark Horse, 2003 series).
This title was the source for the Saturday morning cartoon, Cadillacs and Dinosaurs and has been reprinted as Cadillacs and Dinosaurs (various publishers) and Xenozoic (Flesk Publications, 2010 Series). Artist/creator Mark Schultz has been the subject of several retrospectives.