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Mike, I'm not much of a vert type, but I recall a critter named Protohadros from the Woodbine Fm. of North Texas (Grapevine/Flower Mound area of NW Dallas). It was described by a doctoral student at SMU 8 or 10 years ago. I believe the Woodbine Fm. is Cenomanian, though maybe not all of it. I thought the original name was Prohadros, but that's not what comes up on Google. Maybe Protohadros isn't a hadrosaur in the sense that you mean the term. F Mike Everhart wrote: > All, > Since the recent discovery of hadrosaur remains (scrap) in the Smoky > Hill Chalk > http://www.oceansofkansas.com/New-dino.html > > ...I've been trying to find other records of contemporary or older > specimens for comparison. I came across a comment by Donald Glut (1972) > that suggested that Marsh's specimen of "/Claosaurus/ has the > distinction of being the oldest known hadrosaur of North America." > Carpenter, et al. (1995) noted that "because of it's age, this animal > has come to take on an important role in the phylogeny of these > dinosaurs..." (citing Lull and Wright, 1942, and Ostrum, 1961). > > The new specimen may be as much as 2 million years older... (Upper > Coniacian vs. Lower Campanian) > > I would appreciate any information / suggestions regarding more recent > references to early hadrosaurs from North America. > > Regards, > > Mike Everhart > Adjunct Curator of Paleontology > Sternberg Museum of Natural History > Fort Hays State University, Hays, KS > www.oceansofkansas.com -- Frank K. Holterhoff MATRICuS Inc. Physical Design Engineer 570 South Edmonds Lane, Suite 101 972-221-1614 ext. 18 Lewisville, Texas 75067 fax: 972-420-6895 USA frank@matricus.com www.matricus.com
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