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RE: More on Parasaurolophus
> From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
> Steven Coombs
>
> >What horizon/formation did Parasaurolophus hail from?
>
> P. walkeri: Dinosaur Park Fm (Alberta), Hell Creek Fm(?) (Montana).
> P. tubicen: Kirtland Fm (New Mexico).
> P. cyrtoccristatus: Fruitland Fm (New Mexico.
How secure is your Hell Creek reference? Sullivan and Williamson (1999. NM
Mus. Nat. Hist. & Sci. Bull. 15) discuss the record of the taxon, and list
the specimens as from the following units:
BYU 2467 Kaiparowits Fm. (late early to late Campanian, based on
palynomorphs, contra previous correlations to the Maastrichtian)
FMNH P27393 (type of P. cyrtocristatus) upper Fruitland Fm. or lowest member
of Kirtland Fm. (exact horizon is under scrutiny) (Campanian)
PMU.R1250 (type of P. tubicen) De-na-zin Member, Kirtland Fm. (Campanian, 73
Ma)
NMMNH P-25100 De-na-zin Member, Kirtland Fm.
ROM 768 (type of P. walkeri) Dinosaur Park Fm. (late Campanian)
SMP VP-1090 Fruitland Fm. (late Campanian)
As such, all these records show Parasaurolophus as a mid-late Campanian
taxon.
> >What type of dinosaurs (including avians) are known from there?
Yikes! Lots. Check out various papers in NM Mus. Nat. Hist. & Sci.
Bulletin 17 for the Kirland and Fruitland Fms., and Ryan & Russell's chapter
in Mesozoic Vertebrate Life for the Dinosaur Park Fm. dinos. However, both
these lists lack the birds.
> >Does anyone think it was possible that hypsilophodontids hunted
> bugs near
> >colonies of hadrosaurs like in "The Presence of Dinosaurs"?
Possible, sure. Able to demonstrate, much, much more difficult!!!
Thomas R. Holtz, Jr.
Vertebrate Paleontologist
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
College Park, MD 20742
http://www.geol.umd.edu/~tholtz/tholtz.htm
http://www.geol.umd.edu/~jmerck/eltsite
Phone: 301-405-4084 Email: tholtz@geol.umd.edu
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796