Dermal spine

[Jonkeria@aol.com]

Just a quick question about an ornithishian amidst all this feathered
theropodmania-I have just read Lucas' 1901 description of "Stegosaurus"
(?Polacanthus) marshi, and in it he makes the following statement:
"A dermal spine, found by Mr. J. B. Hatcher, in conjunction with the remains
of Triceratops, and regarded at the time as belonging to that genus, may very
likely have come from the species under consideration" [S. marshi]

Now, I doubt that this Upper Cretaceous find is S. marshi, but what is it? Is
it a badly weathered Triceratops horn, or true ankylosaurian dermal armor,
possibly from Edmontonia?

Sincerely,
Christian Kammerer